Twins, triplets and multiple births occur with to varying degrees in most animal species, although the term is most applicable to species in the Placentalia subclass. A multiple birth, for human beings, results when more than one human baby is born from a single pregnancy. Multiple birth - Classification. The most common form of human multiple birth is twins (two babies), but cases of triplets (three), quadruplets (four), quintuplets (five), sextuplets (six), septuplets (seven), and octuplets (eight) have a ...

Including:

Multiple birth - Classification Multiple birth - Human multiple births
Multiple birth - Causes and frequency Multiple birth - Risks Multiple birth - Cultural aspects Multiple birth - List of famous multiple births Multiple birth - Fictional multiple births

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See also:

Multiple birth, Multiple birth - Classification, Multiple birth - Human multiple births, Multiple birth - Causes and frequency, Multiple birth - Risks, Multiple birth - Cultural aspects, Multiple birth - List of famous multiple births, Multiple birth - Fictional multiple births

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The most common form of human multiple birth is twins (two babies), but cases of triplets (three), quadruplets (four), quintuplets (five), sextuplets (six), septuplets (seven), and octuplets (eight) have all been recorded with all siblings being born alive. The largest set in which all members survived more than a few days is septuplets, the first of which was in 1997. There have been a few sets of nonuplets (nine) in which a few babies were born alive, and there have been pregnancies — but no known instances of live births — of decaplet ...

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Multiple birth, Multiple birth - Classification, Multiple birth - Human multiple births, Multiple birth - Causes and frequency, Multiple birth - Risks, Multiple birth - Cultural aspects, Multiple birth - List of famous multiple births, Multiple birth - Fictional multiple births

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Pregnancy is the carrying of one or more embryos or fetuses by female mammals, including humans, inside their bodies. In a pregnancy, there can be multiple gestations (for example, in the case of twins, or triplets). Human pregnancy is the most studied of all mammalian pregnancies. Human pregnancy lasts approximately 40 weeks between the time of the last menstrual cycle and birth (38 weeks from fertilisation). The medical term for a pregnant woman is genetalian, just as the medical term for the unborn is embryo (e ...

Including:

Pregnancy - Detection and dating Pregnancy - Timeline of a typical pregnancy
Pregnancy - First trimester Pregnancy - Second trimester Pregnancy - Third trimester
Pregnancy - Medical aspects of pregnancy Pregnancy - Birth Pregnancy - Postnatal Period Pregnancy - Terms and definitions
Pregnancy - Technical Pregnancy - Colloquial
Pregnancy - Reference

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The term twin most notably refers to two individuals (or one of two individuals) who have shared the same uterus (womb) and are usually, but not necessarily, born on the same day. A fetus alone in the womb is called a singleton. Due to the limited size of the mother's womb, multiple pregnancy is much less likely to carry to full term than singleton birth (twins usually around 34 to 36 weeks). Since some premature births often have health consequence to the babies, twins birth are often handled with special procedures. Including:

Twin - Types of twins
Twin - Fraternal twins Twin - Identical twins
Twin - Complications of twin pregnancy
Twin - Vanishing twins Twin - Conjoined twins Twin - Parasitic twins Twin - Miscarried twin
Twin - Human twins
Twin - Multiple births Twin - Predisposing factors Twin - Twin studies Twin - Unusual Twinnings
Twin - Twinning in animals

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Historically, about 1 in 80 human births (1.2%) has been the result of a twin pregnancy. The rate of twinning varies greatly among ethnic groups, ranging as high as about 6% for the Yoruba or 10% for a tiny Brazilian village (see [1]). The widespread use of fertility drugs causing hyperovulation (stimulated release of multiple eggs by the mother) has caused what some call an "epidemic of multiple births". In 2001, for the first time ever in the US, the twinning rate exceeded 3% of all births. Thus, approximately 6% of childre ...

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Twin, Twin - Types of twins, Twin - Fraternal twins, Twin - Identical twins, Twin - Complications of twin pregnancy, Twin - Vanishing twins, Twin - Conjoined twins, Twin - Parasitic twins, Twin - Miscarried twin, Twin - Human twins, Twin - Multiple births, Twin - Predisposing factors, Twin - Twin studies, Twin - Unusual Twinnings, Twin - Twinning in animals

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Twin - Vanishing twins. Main article: Vanishing twin Researchers suspect that more pregnancies start out as multiples than come to term that way. Early obstetric ultrasonography exams sometimes reveal an "extra" fetus, which fails to develop and instead disintegrates and vanishes. Twin - Conjoined twins. Main article: Conjoined twin Conjoined twins are monozygotic twins, whose bodies are joined together at birth. This occurs where the single zygote of identical twins fails to separate completely. This condition occurs in about 1 in 100,000 pregnanci ...

See also:

Twin, Twin - Types of twins, Twin - Fraternal twins, Twin - Identical twins, Twin - Complications of twin pregnancy, Twin - Vanishing twins, Twin - Conjoined twins, Twin - Parasitic twins, Twin - Miscarried twin, Twin - Human twins, Twin - Multiple births, Twin - Predisposing factors, Twin - Twin studies, Twin - Unusual Twinnings, Twin - Twinning in animals

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A Breech birth (also known as breech presentation) refers to the position of the baby in the uterus such that it will be delivered buttocks first as opposed to the normal head first position. Breech birth - Etiology. Certain factors can encourage a breech presentation. These include multiple pregnancy (twins, triplets or more), excessive amounts of amniotic fluid, hydrocephaly, anencephaly, very short umbilical cord, and some uterine abnormalities. Babies with congenital abnormalities are more likely ...

Including:

Breech birth - Etiology Breech birth - Epidemiology Breech birth - Categories of Breech Presentation Breech birth - Process of Breech Birth Breech birth - Risks of Breech Birth Breech birth - Factors Influencing the Safety of Breech Birth Breech birth - Diagnosis of Breech Presentation Breech birth - Turning the Baby to Avoid Breech Birth Breech birth - Breech Birth versus Caesarean Section

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A wet nurse is a woman who breast feeds a baby that is not her own. Wet nurse - Reasons for use. A wet nurse may be employed if the birth mother of a baby is unable to breast-feed her infant for reasons such as: drug use (prescription or illegal) illness insufficient production of breast milk. Wet nurses have also been required following multiple births where the mother has proved incapable of adequately nursing all of the children herself. Some we ...

Including:

Wet nurse - Reasons for use Wet nurse - Historical use Wet nurse - Current use

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1673 - Events. January 22 - Impostor Mary Carleton is hanged in Newgate prison in England for multiple thefts and returning from penal transportation March 18 - John Berkeley, 1st Baron Berkeley of Stratton sells his part of New Jersey to the Quakers. May 17 - Trader Louis Joliet and Jesuit missionary-explorer Jacques Marquette begin exploring the Mississippi River and the Great Lakes. November 11- near Chocim (also spelled Khotinin the Ukraine, Lithuanian and Polish military unit ...

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1673 - Events 1673 - Births 1673 - Deaths

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A zygote (Greek: ζυγωτόν) is a cell that is the result of fertilization. That is, two haploid cells—usually (but not always) an ovum from a female and a sperm cell from a male—merge into a single diploid cell called the zygote (or zygocyte). Animal zygotes undergo mitotic cell divisions to become an embryo. Other organisms may undergo meiotic cell division at this time (for more information refer to biological life cycles). Twins and multiple births can be mono ...

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The amniotic sac is a tough but thin transparent pair of membranes, which hold a developing embryo (and later fetus) until shortly before birth. The inner membrane, the amnion, contains the amniotic fluid and the fetus. The outer membrane, the chorion, contains the amnion and is part of the placenta. It is also called the amniotic bubble in resemblance to a bubble. An artificial rupture of membranes (ARM), also known as an amniotomy, may be performed by a midwife or obstetrician. This is usually performed using an amnih ...

Including:

Amniotic sac - Amniotic fluid
Amniotic sac - Complications related to amniotic fluid
Amniotic sac - Multiple pregnancies

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Adonis, an annual vegetation life-death-rebirth deity, imported from Syrian into Greek mythology, always retained aspects of his Semitic Near Eastern origins and was one of the most complex cult figures in classical times. He had multiple roles and there has been much scholarship over the centuries of his meaning and purpose in the Greek religious beliefs. His Semitic counterpart is Tammuz. His Etruscan counterpart was Atunis. (Some mythologists believe he was later exported to Germania, and his counterpart in Germanic mytholog ...

Including:

Adonis - Origin of the cult Adonis - Birth of Adonis Adonis - Modern metaphorical use of the name

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Twin - Vanishing twins. Main article: Vanishing twin Researchers suspect that more pregnancies start out as multiples than come to term that way. Early obstetric ultrasonography exams sometimes reveal an "extra" fetus, which fails to develop and instead disintegrates and vanishes. Twin - Conjoined twins. Main article: Conjoined twin Conjoined twins are monozygotic twins, whose bodies are joined together at birth. This occurs where the single zygote of identical twins fails to separate completely. ...

See also:

Twin, Twin - Types of twins, Twin - Fraternal twins, Twin - Identical twins, Twin - Complications of twin pregnancy, Twin - Vanishing twins, Twin - Conjoined twins, Twin - Parasitic twins, Twin - Miscarried twin, Twin - Human twins, Twin - Multiple births, Twin - Predisposing factors, Twin - Twin studies, Twin - Unusual Twinnings, Twin - Twinning in animals

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Because uranium is a heavy metal and chemical toxicant with nephrotoxic (kidney-damaging)[2], teratogenic (birth defect-causing)[3], and potentially carcinogenic[4] properties, there is a connection between uranium exposure and a variety of illnesses[5]. The chemical toxicological hazard posed by uranium dwarfs its radiological hazard because it is only weakly radioactive. In 2002, A.C. Miller, et al., of the U.S. Armed Forces Radiobiology Research Institute, found that the chemical generation of hydroxyl radicals by depleted uranium ...

See also:

Gulf War syndrome, Gulf War syndrome - Depleted Uranium Birth Defects and Immune System Damage, Gulf War syndrome - Trend, Gulf War syndrome - Neurotoxicity, Gulf War syndrome - Gulf War Syndrome and Multiple Chemical Sensitivity, Gulf War syndrome - Potential Sources of Exposure to Depleted Uranium, Gulf War syndrome - Controversy, Gulf War syndrome - Evidence for, Gulf War syndrome - Evidence against

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Twin - Fraternal twins. Fraternal twins (commonly known as "non-identical twins") usually occur when two fertilized eggs are implanted in the uterine wall at the same time. The two eggs form two zygotes, and these twins are therefore also known as dizygotic. Dizygotic twins, like any siblings, have a very small chance of having the exact same chromosome profile, but most likely have a number of different chromosomes that distinguish them. Dizygotic twins may be a different sex or the sam ...

See also:

Twin, Twin - Types of twins, Twin - Fraternal twins, Twin - Identical twins, Twin - Complications of twin pregnancy, Twin - Vanishing twins, Twin - Conjoined twins, Twin - Parasitic twins, Twin - Miscarried twin, Twin - Human twins, Twin - Multiple births, Twin - Predisposing factors, Twin - Twin studies, Twin - Unusual Twinnings, Twin - Twinning in animals

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The beginning of pregnancy may be detected in a number of ways, including various pregnancy tests which detect hormones generated by the newly-formed placenta. Clinical blood and urine tests can detect pregnancy as early as 6-8 days after date of conception. Home pregnancy tests are personal urine tests, which normally can't detect a pregnancy until at least 12-15 days after conception. Both clinical and home tests can only detect the state of pregnancy ...

See also:

Pregnancy, Pregnancy - Detection and dating, Pregnancy - Timeline of a typical pregnancy, Pregnancy - First trimester, Pregnancy - Second trimester, Pregnancy - Third trimester, Pregnancy - Medical aspects of pregnancy, Pregnancy - Birth, Pregnancy - Postnatal Period, Pregnancy - Terms and definitions, Pregnancy - Technical, Pregnancy - Colloquial, Pregnancy - Reference

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The beginning of pregnancy may be detected in a number of ways, including various pregnancy tests which detect hormones generated by the newly-formed placenta. Clinical blood and urine tests can detect pregnancy as early as 6-8 days after date of conception. Home pregnancy tests are personal urine tests, which normally cannot detect a pregnancy until at least 12-15 days after conception. Both clinical and home tests can only detect the state of pregnancy ...

See also:

Pregnancy, Pregnancy - Detection and dating, Pregnancy - Timeline of a typical pregnancy, Pregnancy - First trimester, Pregnancy - Second trimester, Pregnancy - Third trimester, Pregnancy - Medical aspects of pregnancy, Pregnancy - Birth, Pregnancy - Postnatal Period, Pregnancy - Terms and definitions, Pregnancy - Technical, Pregnancy - Colloquial, Pregnancy - Reference

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Childbirth is the process in which the baby is born. It is considered by many to be the beginning of a person's life, where age is defined relative to this event in most cultures. A woman is considered to be in labour when she begins experiencing regular painful uterine contractions, accompanied by changes of her cervix — primarily effacement and dilation. While childbirth is widely experienced as painful, some women do report painless labours. ...

See also:

Pregnancy, Pregnancy - Detection and dating, Pregnancy - Timeline of a typical pregnancy, Pregnancy - First trimester, Pregnancy - Second trimester, Pregnancy - Third trimester, Pregnancy - Medical aspects of pregnancy, Pregnancy - Birth, Pregnancy - Postnatal Period, Pregnancy - Terms and definitions, Pregnancy - Technical, Pregnancy - Colloquial, Pregnancy - Reference

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Pregnancy - Technical. zygote - from fertilization until second cell division embryo - conceptus between time of fertilization to 10 weeks of gestation fetus - from 10 weeks of gestation to time of birth FASD - Fetal Alcohol Spectrum Disorder, a clinical term for the effects alcohol can have on the developing fetus gestational age - time from last menstrual period (LMP) up to present gravidity (G) - number of times a woma ...

See also:

Pregnancy, Pregnancy - Detection and dating, Pregnancy - Timeline of a typical pregnancy, Pregnancy - First trimester, Pregnancy - Second trimester, Pregnancy - Third trimester, Pregnancy - Medical aspects of pregnancy, Pregnancy - Birth, Pregnancy - Postnatal Period, Pregnancy - Terms and definitions, Pregnancy - Technical, Pregnancy - Colloquial, Pregnancy - Reference

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