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This average decreases for each additional fetus: to 36 weeks for twin births, 32 weeks for triplets, and 30 weeks for quadruplets. [3] With the decreasing gestation time, the risks from immaturity at birth and subsequent viability increase with the size of the sibling group. Only as of the twentieth century have more than four all survived ...
Contraceptives, such as the birth control pill, can help increase inter-pregnancy interval, if desired. Breastfeeding can increase time between births. Family planning, such as the use of contraceptives can increase inter-pregnancy interval. [4] Breastfeeding and extended breastfeeding can also increase birth spacing due to lactational amenorrhea.
The human twin birth rate in the United States rose 76% from 1980 through 2009, from 9.4 to 16.7 twin sets (18.8 to 33.3 twins) per 1,000 births. [5] The Yoruba people have the highest rate of twinning in the world, at 45–50 twin sets (90–100 twins) per 1,000 live births, [6] [7] [8] possibly because of high consumption of a specific type of yam containing a natural phytoestrogen which may ...
In 2004, of the people younger than 35 who gave birth with the help of IVF, 32.7% delivered twins, and 4.9% delivered triplets, according to doctors at the Washington University School of Medicine ...
New moms are trending older—and have been for decades. Those giving birth in 2022 averaged older than 29, and those having their first child weren't far behind at about 27 years old.That's up ...
According to a government report, the rate of twin births peaked in 2014 and has fallen 4 percent since. Twin birth rate at lowest level in decade, and that's a good thing, doctors say Skip to ...
The condition, which occurs in nearly 15% of births, may begin shortly before or any time after childbirth, but commonly begins between a week and a month after delivery. [ 134 ] Childbirth-related post-traumatic stress disorder is a psychological disorder that can develop in women who have recently given birth.
Mammals during pregnancy can have one or more gestations at the same time, for example in a multiple birth. [2] The time interval of a gestation is called the gestation period. In obstetrics, gestational age refers to the time since the onset of the last menses, which on average is fertilization age plus two weeks. [3]