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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Why is it so dangerous to smoke during pregnancy?

I know you shouldn’t smoke during pregnancy, but why exactly is it bad for baby?


I know you shouldn’t smoke during pregnancy, but why exactly is it bad for baby?

The Bump Expert

You know all that icky stuff in cigarettes -- things like nicotine and tar and carbon monoxide? When you smoke, you’re delivering a dose of that nasty stuff straight to your baby. You’re also compromising the amount of oxygen your baby receives. So when you smoke, you’re effectively choosing to send harmful chemicals to your baby instead of the oxygen he needs.

Babies born to moms who smoke are 30 percent more likely to be premature and far more likely than to be have low birth weight than babies born to non-smoking moms. Smoking also increases the risk of birth defects, including cleft lip and palate, heart problems, club foot and defects of the eyes and digestive system. After birth, babies born to smokers are 1.4 to 3.0 times more likely to die of Sudden Infant Death Syndrome (SIDS).
If those aren’t good enough reasons to quit, we don’t know what is. If you’re interested in quitting, talk to your healthcare provider. He can help you revise a plan to manage your cravings and ensure your success. He might also be able to point you toward community resources that can help you quit. Some communities offer quit-smoking text messaging services that have been shown to help smokers kick the habit.

Plus, more from The Bump:

Is it safe to quit smoking cold turkey while pregnant?

How much extra weight will I gain if I quit smoking while pregnant?

Ways to make smoking less harmful to baby?

Kelly Kasper, MD, ob-gyn and associate clinical professor at the Indiana University School of Medicine

Why is it so dangerous to smoke during pregnancy?

I've always known that pregnant women shouldn't smoke but I never knew exactly why. I've asked a friend who's a medic at the alcohol treatment center about the hazards a smoker mother can inflict on her baby. The answer is the same as it is with alcohol or any medication. The substances in the mother's blood stream end up in the baby's system. We may be used to them but the baby certainly isn't and this can damage his development.

DavieAlvin |

Why is it so dangerous to smoke during pregnancy?

Because it can harm the baby, my parents smoked and I ended up with asthma, there is something now called electronic cigarettes, which just give you the nicotine. Maybe ask your doctor if it would be OK? I switched to them so my kids don't have passive smoking. I get them from CloudCigs there really good, maybe ask them for advice?

juliet81 |


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