Aunt Vadge: Can sperm swim from my labia inside?

  • Veronica Danger Vulvovaginal specialist naturopath
    Author: Aunt Vadge
    Qualified Naturopath | BHSc(N)

Hi Aunt Vadge,

My boyfriend and I have been dating about two months. Earlier today we were getting frisky and did everything besides sex. We were dry humping – I was in a bra and pants, he was in underwear – and I know it was just pre-cum, but I’m scared I could get pregnant. It touched the outer part of my vagina, like the lip. Is it possible it could move and go inside, or near where I could get pregnant? I didn’t change afterwards.

Sincerely, Lippy


Dear Lippy,

You can relax: pregnancy from what you have described is extremely unlikely. Sperm can’t ‘swim’ across skin or travel up from the outer lip to somewhere they could reach an egg – they only move short distances, and only in fluid, in the warm environment inside you. On top of that, you were both clothed, and any pre-cum on the outside is quickly finished off by air and time.

The honest nuance is that pre-cum can occasionally carry a small number of live sperm, so ‘clothed dry humping with a bit on the outer lip’ is very low risk rather than an absolute zero. For pregnancy to actually be on the cards, live semen needs to get right to the vaginal opening or inside, around your fertile time – which isn’t what happened here. If you ever do have a genuine unprotected exposure, emergency contraception works well within a few days, and a test three weeks later settles any doubt.

If you’d like to compare it with the other common near-misses, see naked grinding and pre-cum, his penis touched the outside, and the bigger picture in when you can and can’t get pregnant.

The bigger favour you can do yourself is to sort out reliable contraception so this worry stops running your life – it never really ends until you take charge of it. While you’re at it, get familiar with sexually transmitted infections and condoms, since they protect against more than pregnancy.

Warmest regards,
Aunt Vadge

This is general information, not a substitute for personalised medical advice.



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