Marijuana and Fertility: #1 Does Smoking Weed Affect Getting Pregnant?

does smoking weed affect getting pregnant

To answer the question “#1 Does smoking weed affect getting pregnant?”, yes, it does. We all know the use of cannabis has various effects on human and fertility is one of them. This is why it is recommend that pregnant and breastfeeding mothers shouldn’t use marijuana. In this article, we will look at existing research to provide you with accurate details of the relevance between cannabis and women’s infertility.

Marijuana Affects Your Ability to Conceive

Cannabis can disrupt menstrual cycle and suppress oogenesis (production of eggs in the ovaries); impair embryo’s capacity to implant itself and develop in the womb (uterus).

Ovulation is triggered because of luteinizing hormone (LH). In 2002, a clinical literature published in the Journal of Pharmacology showed that weed decreases the level of LH secreted. This leads to an anovulatory cycle, in which an egg isn’t matured and released. Even if your body did release the eggs, it may not be able to be fertilized. Or, it may have chromosomal abnormalities that make the resulting zygote incompatible with life.

The embryo only can be implanted when the eggs meet the sperms in time. Yet marijuana will slow down the speed of the egg when it travels from the ovary to the uterus. When it arrives, all the sperm already lost its viability. An embryo failed to stay in the proper place in the uterus increases the risk of ectopic pregnancy. An ectopic pregnancy is when an embryo implants in the fallopian tube. These pregnancies are painful and can endangers the mother’s life.

Smoking weed also harms the endocannabinoid system, which is required to be precise in the right time. Imbalance in the system may increase the body’s natural THC, anandamide. It makes the embryo hard to be implanted. In high concentrations, anandamide even prevents sperm from fertilizing an egg.

Marijuana Affects Pregnancy

Some studies suggest that smoking weed during pregnancy causes premature birth to your baby. Using marijuana furthermore increases carbon monoxide levels in the bloodstream. It blocks out the baby oxygen and nutrients’ resource – which may restrict his/her growth. As a result, the baby’s length, foot length, head size, and body weight will be affected. In some cases, the baby might have a ventricular septal defect (“a hole in the heart”).

After being born, toddlers who exposed to marijuana in their mothers’ wombs have higher chances to have different brain activity and more disturbed sleeping patterns. As they grow up, they may suffer from depression or have behavior problems. Their verbal, memory and reasoning ability are also poorer. They are more likely to be fearful, hyperactive and delinquent.


Whether you are using marijuana for medicinal purposes or other reasons, if you are a regular user and planned to become pregnant, you need to stop taking cannabis at least one month in advance. For occasional users, it needs a few days. And for long-term smokers who use a lot of marijuana, it requires two to three months. Only after all traces of the drug were eliminated from your body did the conception happen easy and safe. For more details on how marijuana affects man’s infertility, check it out at “Marijuana and Fertility: #2 Does smoking weed lower your sperm count?”.



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