Pregnancy Week by Week

Get a window on what’s happening in your pregnancy, week by week. From week four to week 42, your baby is experiencing a miraculous transformation from a clump of cells to a fully formed (and totally cute) newborn. Just imagine, as early as five weeks, your baby is already starting to form major organs (heart, stomach, liver, and kidneys) and systems (digestive, circulatory, nervous). By eight weeks, your raspberry-sized womb-mate is moving her arms and legs. At the beginning of your second trimester (week 14), your wee one is sucking his thumb. By week 28, the first week of the third trimester, baby (now as big as an eggplant) is prepping for breathing, developing his eyesight and packing on pounds in anticipation of life outside the womb. Each week is a new miracle. Less miraculous is how a mom-to-be may feel. Pregnancy Week-by-Week charts your baby’s development but also lets mom know what she might be feeling during each week of her pregnancy. Pregnancy week by Week includes everything mom needs to know to feel a sense of control over her pregnancy. Each week offers a complete guide to what you might feel, your must-do’s, your nice-to do’s, and answers and advice on everything pregnancy-related. Plus each week’s guide offers tips on maintaining a healthy and comfortable pregnancy from strategies on coping with pregnancy symptoms (morning sickness anyone?) to ideas for healthy eating, and pointers on talking to your OB. Let us guide you along your pregnancy, week by week.

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Q&A: When does breast milk form?

When exactly does breast milk form in the body?

Re: When exactly does breast milk form in the body?

The Bump Expert

During the second trimester, increased levels of hormones will stimulate the production of milk in the mammary glands as well as the growth of milk ducts in your breasts. (Milk ducts are lobes in your mammary gland at the tip of the nipple.) But it’s not until after you deliver that you’ll begin full-scale milk production.

Right after you give birth (but sometimes as early as the second trimester), your breasts produce something called colostrum, which looks like a thick, yellowish fluid. It’s full of antibodies and will help strengthen baby’s immune system. Since baby only needs a small amount of nutrients in these first few days (because of their small tummy size), your body will naturally hold off on allowing actual breast milk to flow until after baby’s three or four days old. By this point, your body will produce milk in a supply-and-demand-like manner, making as much it needs to based on your breastfeeding patterns.

The Nest Editors Madelyne Dolandolan

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