Many newly pregnant women wonder, “Is it twins?” Although twin pregnancies are more easily identified later in pregnancy, even at the time of the first missed period, or 4 weeks of pregnancy, there may be clues that more than one baby is on the way. Some signs are definitive, but others are only suggestive.

Being pregnant with twins often carries with it twice the worry and more discomfort than a single pregnancy, particularly toward the end of the experience.

The hormone HCG, which stands for human chorionic gonadotropin, helps to communicate to your body that you're pregnant and maintains the pregnancy during its early weeks and months.

By 35 weeks pregnant, when a woman is carrying twins, the big day can arrive any time. A twin pregnancy is considered full term at the 37-week mark; however, many twins are born prior to that time. At 35 weeks pregnant, mom and babies are gearing up for the big day.

Being15 weeks pregnant with twins may be exciting and terrifying all at once. Advances in reproductive technologies as well as the advancing age of women who become pregnant mean that twins are becoming more and more common.