A–Z Glossary

Nicotine dependence

Nicotine dependence is a medical condition in which nicotine use becomes difficult to stop without support and repeated attempts.

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Quitting smoking before pregnancy

Quitting smoking before pregnancy

Why quitting before conception matters Smoking affects pregnancy before many people know they are pregnant. In the first weeks after conception, the embryo implants and the placenta begins to form. Cigarette smoke exposure during this period can affect oxygen delivery, vascular function, inflammation, and placental development. Carbon monoxide binds hemoglobin with high affinity, reducing oxygen […]