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.

More about pregnancy week-by-week Less about pregnancy week-by-week

baby registry

need to buy a gift?

Find baby registries (at top retailers!) and websites with one easy search.

what's hot around the web

baby websites

you asked...

Q&A: Vaccinations okay during pregnancy?

My last period was more than seven weeks ago. I've taken multiple tests, including a blood test and all have been negative. With my son, I did the same thing and couldn't get a positive test until I was 9 weeks. I have vaccinations for school that I am due for and need to know whether or not I should take them. What do you suggest? -- Mrs.Mandy

Re: My last period was more than seven weeks ago. I've taken multiple tests, including a blood test and all have been negative. With my son, I did the same thing and couldn't get a positive test until I was 9 weeks. I have vaccinations for school that I am due for and need to know whether or not I should take them. What do you suggest? -- Mrs.Mandy

The Bump Expert

Depending on which test you use, you may be able to tell if you are pregnant in as little as a week after ovulation. A blood test is the earliest test to show a positive result (7-11 days after ovulation), while some home pregnancy test kits can test positive at the time of your missed period (14 days after ovulation) in up to 95% of pregnant women. If your last period was more than seven weeks ago and all tests since then have been negative, then it is unlikely that you are pregnant. But, it is difficult to say for sure without knowing the length of your usual cycles (the number of days from the first day of one period to the first day of the next).

With this information, if you still think that you might be pregnant, you should ask specifically which vaccinations you need. Some vaccinations (e.g. the flu shot) are safe during all trimesters of pregnancy. In fact, it is recommended that all pregnant women and women who plan on being pregnant during flu season (October through May) receive the inactivated flu vaccination. Other vaccinations such as the rubella vaccination should not be given during pregnancy. The rubella vaccination is what we call a live attenuated vaccine, meaning it consists of live but weakened virus. If you receive this vaccination during pregnancy, it can theoretically cross the placenta and affect the fetus although there have been no reports of adverse fetal effect in women who were inadvertently vaccinated during the first trimester. For more information, visit the CDC’s website. It’s a great resource with information about vaccination during pregnancy.

Dr. Ashley Roman

tools

My Pregnancy Calendar
Count down to delivery with your pregnancy calendar.
baby names
Browse 1000s of baby names in our Baby Namer tool.
pregnancy tickers
Create your own pregnancy ticker.
how big is baby
From poppyseed to papaya, see how baby grows each week.

>> See all tools