Page ContentWhat Your Partner Should Know About Your PregnancyFirst Trimester | Second Trimester | Third Trimester | Postpartum Women who have an involved and supportive partner during pregnancy are more likely to give up harmful behaviors, such as smoking, and lead healthier lives. Babies may be born healthier as well, with lower rates of preterm birth and growth problems. Women who are well supported during pregnancy may be less anxious and have less stress in the weeks after childbirth. You can be supportive by educating yourself about pregnancy and joining her in making healthy lifestyle choices. Eat healthy meals together and make sure that she gets plenty of rest. Exercise during pregnancy is also important. No amount of alcohol is considered safe during pregnancy. Illegal drugs, such as heroin, cocaine, methamphetamines and prescriptions drugs used for a nonmedical reason, can harm a developing baby. Marijuana is not recommended during pregnancy. Second hand smoke can also be harmful for the pregnancy. Pregnant women who breathe in secondhand smoke have an increased risk of having low-birth weight babies. Infants and children who are around second-hand smoke have higher rates of asthma, respiratory infections, ear infections, and sudden infant death syndrome (SIDS). For all these reasons, smoking should be avoided in the home or car. Unless your partner's doctor has told her otherwise, you can have sex throughout pregnancy. You may need to try new positions as your partner's belly grows. Also, keep in mind that intercourse may be uncomfortable at times for your partner.