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    11 Things You Didn't Know About Twin Pregnancies

    Experts share their advice for women who are pregnant with twins.

    No. 4: Morning sickness may be worse with twin pregnancies.

    "One of the things that is postulated as causing morning sickness is high levels of human chorionic gonadotropin, and we know that levels of this hormone are higher in twin pregnancies, so women carrying twins have a higher incidence of nausea and vomiting in the first trimester," says Al-Khan. The good news? Most morning sickness abates within 12 to 14 weeks of pregnancy -- even in twin pregnancies.

    That's not all, Monga says. Moms pregnant with twins complain of more back pain, sleeping difficulties, and heartburn than moms who are carrying one child. Moms pregnant with twins also have a higher rate of maternal anemia and a higher rate of postpartum hemorrhage (bleeding) after delivery.

    No. 5: Spotting may be more common during twin pregnancies.

    "When you spot in the first trimester, you could be undergoing a miscarriage, and miscarriages are more common in mothers of twins, triplets, and quadruplets -- so we see more spotting in first trimester with multiples," Al-Khan says.

    But a little spotting is no reason to hit the panic button even in twin pregnancies. "A little spotting in the absence of cramps is reassuring, but when you are cramping, passing clots, and actively bleeding, that is a sign that's something is happening and you should seek medical advice."

    No. 6: You don't feel the babies kicking any earlier with twin pregnancies.

    "Generally when you are pregnant with twins, fetal movements become more noticeable at weeks 18 through 20 of pregnancy, and the same is true in singleton pregnancies," Al-Khan says. When a woman begins to feel fetal movements actually depends on whether she has been pregnant before. "If you have been pregnant before, you know what fetal movement is, but if you are pregnant for the first time, you really can't distinguish the movement from gastrointestinal activity."

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