NEW Reproductive health care beyond birth control
SimpleHealth
How It Works
Blog
$20 Complete Care
Supplements
Our Medical Team

Commonly asked question

How quickly is Annovera effective after I insert it?

How does Annovera compare to the NuvaRing?

How do I have sex with Annovera?

How does SimpleHealth work?

Is SimpleHealth using real doctors?

How do I get refills?

What do I do if I'm experiencing a medical emergency?

How Do I Delay My Subscription Order?

I'm experiencing side effects. Can I get a new Rx?

See all FAQs
All FAQs
Birth Control: Getting Started and Best Practices

How does birth control prevent pregnancy?

Last updated on September 1, 2020

The hormones in birth control pills, the patch, and the ring do three things: they prevent your ovaries from releasing eggs (ovulating), they thicken your cervical fluid, and they thin your uterine lining. Without an egg, there isn’t anything for sperm to fertilize, so pregnancy can’t happen. Additionally, with thicker cervical fluid, sperm have a harder time entering your uterus and swimming to an egg. Finally, should any of the prior mechanisms fail, a thinner uterine lining helps prevent implantation of an egg. It’s a three-pronged approach to effective and safe pregnancy prevention.

Can’t find what you need?