Medical Specialty >> Reproductive Medicine

Doctors Lounge - Reproductive Medicine Answers

Back to Reproductive Medicine Answers List

If you think you may have a medical emergency, call your doctor or 911 immediately. Doctors Lounge ( does not recommend or endorse any specific tests, physicians, products, procedures, opinions, or other information that may be mentioned on the Site.

DISCLAIMER: The information provided on is designed to support, not replace, the relationship that exists between a patient/site visitor and his/her physician. Please read our 'Terms and Conditions of Use' carefully before using this site.

Date of last update: 10/16/2017.

Forum Name: Fertility

Question: Does size matter when trying to conceive a baby?

 TERRYKING12345 - Sun Mar 23, 2008 10:12 am

Does size matter when trying to conceive a baby? I would just like to know does the penis have to be at least a certain size for the sperm cells to reach the females egg? I would be very gratful for an answer as i have been trying to get my g/f pregnant for about 8 months and have still not sucseeded. Thankyou.
 Debbie Miller, RN - Mon Mar 24, 2008 5:36 pm

User avatar Hello,
Size has nothing to do with it. The sperm swim so as long as the penis is inserted into the vagina when you ejaculate, this is all that is necessary. Some fertility specialists advocate having the woman remain still with hips slightly elevated after sex to make the most of gravity and you may want to watch her cycle to time your sexual activity with her most fertile days (day 8 through 19 typically with the 14th day being the most likely time for someone with a regular cycle of around 28 days).

It is not unusual for it to take up to a year to achieve pregnancy, even when actively trying. After a year, they usually recommend getting fertility testing done. You could see a urologist for a sperm count - quite easily done. If that is normal, your partner could also see a gynecologist to see if they see anything unusual with her cycle, etc.

Good luck to you.

| Check a doctor's response to similar questions

Are you a Doctor, Pharmacist, PA or a Nurse?

Join the Doctors Lounge online medical community

  • Editorial activities: Publish, peer review, edit online articles.

  • Ask a Doctor Teams: Respond to patient questions and discuss challenging presentations with other members.

Doctors Lounge Membership Application

Tools & Services: Follow DoctorsLounge on Twitter Follow us on Twitter | RSS News | Newsletter | Contact us