1. Hot baths, steam rooms, saunas (traditional and infrared) Why? Heat and sweat cause decreased blood flow (and blood to pool in your feet), which means the baby gets less oxygen.

2. Contrast hydrotherapy (alternating hot and cold pools or rooms). Constant temperatures are best.

3. Body wraps that cause perspiration and raise core body temperature.

4. Essential oils (concentrated plant extracts) are verboten during the first trimester. It's safe to reintroduce rose, lavender, and chamomile during the second trimester, as long as they're diluted with twice the amount of carrier oil.

The above are meant as simply suggestions, for your safety and enjoyment. As always: please consult your physician before undergoing any spa treatments during pregnancy.