multiple pregnancies

The woman must have 2 eggs simultaneously in the same menstrual cycle and both eggs are conceived by 2 different sperm, this situation is extremely rare.

The rate of twins and triplets in the United States has increased dramatically since 1980 and this phenomenon was ultimately determined by artificial interventions.

Vladislav Korsak, Professor of Medicine, Chairman of the Russian Reproduction Association says that in reproduction there is no concept of