The Short Answer: Yes
Even though fertility declines significantly in your 40s, pregnancy is still possible during perimenopause. As long as you're still having periods—even irregular ones—you may still be ovulating some months.
In fact, unplanned pregnancy rates in women over 40 are higher than many people expect, partly because many women assume they can't get pregnant anymore.
Why Pregnancy Is Still Possible
During perimenopause, ovulation becomes unpredictable. You may skip ovulation for a few months and then ovulate unexpectedly. Because you can't reliably tell when (or if) you'll ovulate, using contraception remains important if you don't want to become pregnant.
How Long Do You Need Birth Control?
General guidance suggests continuing contraception until:
- Age 55, when natural fertility is extremely unlikely for nearly all women, or
- You've gone 12 months without a period after age 50, or 24 months without a period before age 50
If you're using hormonal birth control, it can mask your natural cycle, so your provider can help you decide when it's safe to stop.
Contraception Options in Your 40s
- Hormonal IUD: Highly effective and can also reduce heavy perimenopausal bleeding
- Copper IUD: Hormone-free and long-lasting
- Implant: Very effective and long-acting
- Progestin-only pills: An option for women who shouldn't use estrogen
- Combined pills, patch, or ring: May also help regulate cycles and hot flashes for healthy non-smokers, but aren't right for women with certain risks like high blood pressure, migraine with aura, or a history of blood clots
- Barrier methods: Condoms also protect against sexually transmitted infections
- Permanent options: Tubal procedures or partner vasectomy
What About Wanting to Get Pregnant?
If you're hoping to conceive in your 40s, talk with a provider early. Fertility declines quickly in this decade, and pregnancy after 40 carries higher risks that deserve careful planning.
Learn more about provider-guided women's health support here: Heva Hormone Optimization
The Bottom Line
Pregnancy is still possible during perimenopause. If you don't want to get pregnant, keep using contraception until your provider confirms you've reached menopause.