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: What causes morning sickness?

I am constantly nauseated! Why?

Re: I am constantly nauseated! Why?

The Bump Expert

What causes morning sickness?

Before your pregnancy, you probably imagined that when you woke up in the morning, you’d be nauseous, throw up, and then go on with your day. Well…not so much. Whoever decided to call it “morning sickness” was probably sleeping through the day because it doesn’t discriminate between the morning, afternoon, or evening.

There’s no clear answer as to why nausea occurs during pregnancy, although it’s believed that it’s due to hormonal changes (that seems to be the answer to everything these days). Generally the nausea isn’t too overwhelming, and by mid-pregnancy, you should be relieved of it, mostly. But, if your nausea and vomiting are excessive, then talk to your doctor because it may be hyperemesis gravidarum, a rare complication that results in a poor intake of fluids and food (and a hungry baby).

Although you can’t really prevent morning sickness, studies show that women who took multivitamins before conception are less likely to get nauseous -- so, if you’re TTC, start sucking those vitamins down now. 

watch: top causes of morning sickness

By Sandra Le Plasse


Is it bad if you don't have morning sickness?

LiamMadden |

Q&A: What causes morning sickness?

My RN suggested switching my pre-natal vitamin routine from morning to bed time and it has done wonders! Still getting the same benefits, but not the completely nauseated feeling I was having all day long!!

LauraMarie83 |


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