Pregnancy happens through the vaginal opening. This is the specific opening where sperm can enter, travel deeper into the reproductive tract, and eventually reach an egg. The vaginal opening is one of three separate openings in the vulva area, and it’s the only one connected to the reproductive organs.
Three Openings and Their Purposes
The external area between a woman’s legs, called the vulva, has three distinct openings arranged from front to back. Understanding which is which clears up a lot of confusion.
- Urethral opening: This small opening sits just below the clitoris. Its only job is to release urine from the bladder. It is not connected to any reproductive organs, and pregnancy cannot occur through it.
- Vaginal opening: Located just below the urethral opening, this is the opening involved in pregnancy. The vagina is a flexible, muscular canal that connects to the uterus inside the body. Menstrual blood exits through it, babies are born through it, and sperm enters the reproductive system through it.
- Anus: Located farther back, separated from the vaginal opening by a small patch of skin called the perineum. The anus is part of the digestive system and has no connection to reproductive organs.
These three openings are close together, which is part of why they’re easy to confuse. But each one leads to a completely separate system inside the body.
How Sperm Travels to an Egg
Once sperm enters the vaginal opening, it has a surprisingly long journey ahead. The vagina is a canal that leads to the cervix, a narrow passage at the bottom of the uterus. The cervix acts as a gatekeeper. Around the time of ovulation, it produces thin, stretchy mucus that helps sperm swim upward into the uterus. When ovulation isn’t happening, that mucus thickens and makes it much harder for sperm to get through.
Sperm that make it past the cervix swim through the uterus and into the fallopian tubes, which are two narrow tubes extending from the top of the uterus toward the ovaries. Fertilization, the moment sperm meets egg, almost always happens inside one of these fallopian tubes. The fertilized egg then travels down into the uterus and implants in the uterine wall, where pregnancy begins.
The entire route from vaginal opening to fallopian tube is only about 15 to 18 centimeters, but for something as tiny as a sperm cell, it’s a marathon. Sperm can survive inside the cervix, uterus, and fallopian tubes for about 3 to 5 days. This means pregnancy is possible even if sex happens a few days before ovulation.
Can You Get Pregnant From the Other Openings?
No. Pregnancy requires sperm to enter the vaginal opening. The urethra leads only to the bladder, and the anus leads to the digestive tract. Neither is connected to the uterus or fallopian tubes in any way.
That said, there is one practical nuance worth knowing. If semen is spilled onto the vulva near the vaginal opening during any type of sexual contact, there is a small possibility that sperm could make its way into the vagina. Pregnancy from this kind of indirect contact is uncommon, but it is not impossible. The key factor is whether semen comes into contact with the vaginal opening, even externally.
Finding the Vaginal Opening
If you’re looking at or feeling the vulva from front to back, here’s the order: the clitoris is at the very top, a small, roughly pea-sized structure tucked under a fold of skin called the clitoral hood. Just below that is the urethral opening, which is very small and can be hard to see. Below the urethral opening is the vaginal opening, which is noticeably larger. And farther back, past a small bridge of skin, is the anus.
The vaginal opening is surrounded by the inner lips (labia minora), which vary widely in size and shape from person to person. The opening itself can look different depending on the individual, but it’s always located in the same position relative to the other structures: below the urethra and above the perineum.