Using illicit (illegal) or recreational drugs, such as cannabis, synthetic cannabis (known as spice), cocaine and other drugs such as ecstasy, ketamine and amphetamines may contribute to fertility problems. This means that if you or your partner take drugs, you may find it more difficult to get pregnant. Illegal or recreational drugs can also cause serious problems in pregnancy.
Cannabis is the most commonly used drug. In women, heavy cannabis use can cause hormone dysregulation (unbalanced hormones) so women who use it are likely to have problems getting pregnant, compared to those who don’t.
Other legal drugs such as diazepam and opiate painkillers (whether prescribed or not) may also cause problems. If you're trying for a baby it is important to check with your doctor or pharmacist before taking any medications.