Olympic curler Kristie Moore is five months pregnant. Is this okay? Our OB/GYN reacts.

Dr. Suzanne Gilberg-Lenz: Kristie Moore is the first Olympian in 90 years to compete while pregnant.

I can tell you with confidence that of all the Olympic sports, this one might actually be one of those best suited for a pregnant woman! Exercise and fitness are encouraged during pregnancy. Regular, moderate exercise is known to decrease fatigue and nausea during the first trimester, and to increase stamina, flexibility and potentially endurance in later trimesters -- possibly even during labor!

Exercise is best started well before pregnancy as part of any woman's healthy lifestyle. But even for fit women, the types of exercise that are safe can change during the course of pregnancy. As a pregnancy proceeds, balance can become an issue; aerobic exercise that is lower impact -- such as walking, gym machines, swimming, stationary cycling, yoga or strength training -- is generally safe.

To be clear: No-nos include downhill skiing, contact sports, surfing, horseback riding, skateboarding and scuba diving. Obviously, most X-Games athletes would probably need to take a break. I usually advise my patients, "If you fall, will you freak out? Then don't do it!"

Olympic athletes are presumably some of the most fit people on the planet, so it's absurd to think that curling when you're five months along would do anything but benefit mother and baby. A happy, fit, endorphin-filled mom is a great place for a baby to grow! Besides, lugging around an 8-pound kid after birth should be easy-peasy for a woman used to shoving a 40-pound weight across the ice.

Sound off: Do you think competing in the Olympics while pregnant is dangerous and selfish ... or no biggie? Comment below.

Dr. Suzanne Gilberg-Lenz completed her undergraduate education at Wesleyan University and post-baccalaureate pre-med studies at Mills College. She earned her medical degree from the USC School of Medicine and has been in private practice for nine years. She is the cofounder of Cedar Sinai Medical Center's Green Committee and lives in Los Angeles with her husband and two children.