Typically, only one egg is released from a human ovary in a given menstrual cycle, which is known as ovulation. However, in some cases, multiple eggs can be released, resulting in the possibility of fraternal twins or other multiple births.
If a mother gave birth to identical twins, it means that a single fertilized egg split into two embryos, which means only one egg would have been released from the ovary.
On the other hand, fraternal twins are the result of two separate eggs being fertilized by two separate sperm. Therefore, in this case, two eggs would have been released from the mother's ovaries.
It's important to note that the number of eggs released can vary depending on a variety of factors, including hormonal fluctuations, fertility treatments, and other medical conditions.