It was my third pregnancy, and when my bump grew faster, I assumed it was because I had done this before. It turned out I was pregnant with twins. They refused to take a DNA test now as adults to find ...

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 ...

Fraternal or dizygotic twins develop from two different eggs fertilized by separate sperm; they generally share about 50 percent of their genes. Therefore, fraternal twins are essentially like typical ...

The number of twins and triplets born can vary significantly between IVF clinics, new data shows, but experts warn that ...

Katelyn Nakatsu and Jedidiah Duggar are ready to welcome twins. Pic credit: @JedKateyDuggar/YouTube Jedidiah Duggar and Katelyn Nakatsu are just weeks away from meeting their twin girls. Aside from ...