Dear jason18,

It only takes a very small amount of semen (ejaculate) to cause pregnancy. That's because each drop of healthy ejaculate contains millions of tiny sperm. Usually, between a teaspoonful and a tablespoonful of ejaculate is released at a time. Pregnancy can happen when ejaculate or pre-ejaculate ("pre-cum") gets in the vagina or on the vulva.

Hope this information helps!

Take care,

teenwire.com^® Editors

This column is for informational purposes only and is not intended to constitute medical advice, diagnosis, or treatment. If you have a medical problem, please call toll-free 1-800-230-PLAN for an appointment with the Planned Parenthood health center nearest you.