What's the meaning of fraternal twins? Fraternal twins come from two separate fertilized eggs that develop in the womb at the same time, each with their own placenta and amniotic sac. Like any ...

Twins are taking over! These days, around 31 out of every 1,000 babies born in the U.S. are twins, according to the Centers for Disease Control and Prevention (CDC). Back in 1980, only about 19 in ...

Although there are some rare exceptions, identical twins are almost always the same sex. Because identical twins occur when a single fertilized egg splits and forms two embryos, each embryo has the ...

The birth of twins in all human populations is puzzling because the female uterus is designed to carry just one fetus. Multiple birth pregnancies have higher frequencies of serious physical and health ...

Twins have long been studied to understand autism causes. — -- When Jenn Medvin asked her daughter, Avery, what she wanted to be as an adult, the 6-year-old gave a range of answers from doctor to ...

Twins share a special bond, look alike, and sometimes even seem to finish each other's sentences. Fun facts about twins you never knew [X.com] Twins share a special bond, look alike, and sometimes ...

Environmental factors significantly influence the development of allergic diseases, overshadowing genetic predisposition. Identical twins showed higher incidences of atopic dermatitis, rhinitis, and ...