Raw oysters during pregnancy

Being pregnant doesn't make it any riskier to eat raw oysters. Anytime you eat raw shellfish there's a chance you could get something that's not good. Oysters can carry hepatitis. If you get hepatitis when you're pregnant, you'll probably get sicker than you would otherwise. But acute hepatitis A, hepatitis B, and hepatitis C are usually not transmitted across the placenta to the baby. So it really just depends on how much you want to eat those oysters.

Riding horseback during pregnancy

Riding horseback during pregnancyAs long as you're having a normal uncomplicated pregnancy, it wouldn't cause a problem. (There might be some pregnancy complications where you'd restrict activity, like pre-term labor or placenta previa, where you're at risk for bleeding from the placenta.) Otherwise, if you're a regular horseback rider, and you feel confident about your skills and aren't doing things that are treacherous, there's no reason you can't keep on riding.

Playing tennis during pregnancy

Playing tennis during pregnancyIf you're a very good tennis player, it probably is safe. But the American College of Obstetricians and Gynecologists recommends avoiding sports with a high likelihood for contact or falling — and that includes tennis. One of the concerns with racquet sports such as tennis is that they often involve rapid changes in direction. With the changes in your center of gravity during pregnancy, these rapid twists and turns could make you more prone to falling. If you fall you could start bleeding if the placenta de...

Jogging during pregnancy

It's generally safe to jog pretty much throughout your pregnancy. It gets harder as you get further along and are carrying more weight, but there's no danger to the fetus. As pregnancy progresses, even the expert runner generally needs to modify her routine. It's not okay to jog, however, if you have placenta previa, where the placenta covers the cervix, because too much jolting can make you bleed. It's also unsafe if you have pregnancy-induced hypertension or preterm labor or are at high risk for a preterm...

Ice-skate or Roller blade during pregnancy

There's a risk of falling in any sport where maintaining your balance is an issue, and that can carry added risks if you're pregnant. A fall could cause abdominal injuries that could affect the pregnancy. Trauma to the abdomen can cause premature separation of the placenta or premature labor. It could even fatally injure the fetus. So it's a matter of personal judgment: Do you feel confident enough in your abilities, and do you want to take the risk?

Mountain-biking during pregnancy

While biking is fine for most people, if you have placenta previa (which means the placenta is covering the cervix), you wouldn't want to do it because the bumping up and down could cause bleeding problems. And as you get further along in your pregnancy it'll be harder to bike and riskier. In the last trimester, it's more difficult to balance and there's more risk that you could fall off the bike. You might want to consider riding a stationary bike as an alternative during pregnancy.

Diet during pregnancy

I don't recommend it — pregnancy is not the time to diet. Normally, you should gain about 25 to 30 pounds during pregnancy. If you're overweight, you may want to shoot for the lower end of that range. The recommendation for women who are morbidly obese is to gain only 15 pounds. Some gain is inevitable given the weight of the baby, the enlarged uterus, the placenta, and the amniotic fluid. But that's weight that should disappear quickly once the baby is born. On average you should be getting about 2,500 cal...