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.
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.
Having quadruplets means having four babies at one time (one pregnancy/one delivery with multiple births).
No.
multiple, sometimes up to ten
record for multiple births without fertility drugs
The uterus of pigs has separate canals instead of a single canal. The evolutionary advantage of this is that multiple births can be performed.
Only in Dogs. In humans and other species multiple births are cause during the ovaluation period.
Nine (9) have been born live without treatment; they all died within days of birth. There are also reports of up to twelve (12) births from the same pregnancy, but no indication of how many were alive.
From 1000 births 16.3 will be multiple according to the website linked below
53
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.
2 sperm cells hit the egg