The problem with multiple births is that there is only so much room in even the most accommodating womb (uterus). Babies need to reach a certain size and gestational age before they can survive outside the uterus.
No.
record for multiple births without fertility drugs
multiple, sometimes up to ten
Only in Dogs. In humans and other species multiple births are cause during the ovaluation period.
53
From 1000 births 16.3 will be multiple according to the website linked below
The largest number of single births to one woman without any multiple births is 69. This record is held by the wife of Feodor Vassilyev, a peasant from Shuya, Russia, who gave birth to 69 children in the 18th century.
Human normally have single births from a pregnancy, whereas the expanded uterus in cats facilitates multiple births. if your cat is pregnant, the uterus will be greatly enlarged and you may find many fetuses inside.
2 sperm cells hit the egg
It takes 40 wks for a foetus to reach full term maturity in single or multiple births. Multiple births are induced earlier if there are problems.
No, not in particular. The mutable signs (Gemini, Virgo, Sagittarius, Pisces) in general indicate multiple births.
The number of multiple births per year can vary depending on the population and region. In the United States, for example, about 3% of all births are multiples, which includes twins, triplets, and higher order multiples. This percentage has been relatively stable over the years.