Twins occur in about one out of 90 human pregnancies in the US. As a rule, at conception, one sperm fertilizes a single egg to produce a zygote. Two thirds of twins are fraternal, with fertilization ...

I am currently 34 years old and would like to get pregnant as soon as possible, ideally with one set of twins. How can I find a local doctor to assist me with this? Dr Lena Dear Dr Lena, Twins are two ...

Twins are individuals who learn to share before they are born. More often than not, sharing is natural or inevitable for twins because they are conceived and born together and in most situations share ...

A 19-year-old mother has given birth to twins who were later found to have different fathers, in what doctors describe as an exceptionally rare reproductive event. A paternity test confirmed that each ...