2nd trimester: Week 15

Shopping

If your regular bras are starting to pinch, invest in ones made especially for pregnant women. Good maternity bras should provide you with ample support, have wide straps, and be made of fabric that won't irritate your already sensitive nipples.

Hot Picks:

Exercise

It's not too late to sign up for prenatal yoga, a gentle regimen that combines exercise tailored especially for your changing body with breathing techniques. An added bonus: You'll meet other expectant moms, and if you hit it off with some of them, you've got a built-in mother's group waiting in the wings.

Relationships

Your off-and-on libido may now be returning from its nausea- and fatigue-induced first-trimester sabbatical, so take advantage of it while it's here. It just may pull another disappearing act sometime during the third trimester. But avoid one position: the missionary. Lying flat on your back is not a good idea because it may put too much pressure on the veins that deliver oxygen to the baby.

Your Relationship:

Siblings

Look through baby photos with your older child to help her understand what newborns are like. Share tales of how she discovered the world (how she'd cry to tell you she was hungry or how she'd laugh when you puffed your cheeks), and point out that her new sibling may do the same things.

Twins

Many parents of twins swear by "co-bedding" because it saves space, and many believe babies sleep better with their womb-partner close by. This practice, however, is not recommended by the SIDS Alliance. Laura Reno, a spokesperson for the group, points out that you don't know when an infant will begin rolling over, and if a twin can burrow his face into his sibling, there could be an elevated SIDS risk.