Vaginas are acidic and semen is alkaline. Acidity and alkalinity are measured by pH, with zero being the most acidic and 14 being the most alkaline. Anything under seven is on the acidic side of things, while anything over seven is on the alkaline side. Healthy vaginas have a pH between 3.
Everything is normal with both of us. Ovulation study shows normal cycle. I have observed that after the intercourse, the moment my husband withdraws his penis, all the semen comes out of the vagina. We tried using a pillow beneath, which helped in keeping the semen inside for few minutes. But after 10 minutes the semen comes out of the vagina. Could this be the cause of infertility? Is it normal? What is the solution? Out of KY Jelly or liquid paraffin, which is a sperm friendly lubricant?
Still with me? Good.
Illustration by Brandon Bird. The human body, much like the Internet, is a series of tubes. These tubes transport all sorts of liquids: blood, sweat, tears, jizz, cerebrospinal fluid, and pee-pee. These liquids are supposed to stay flowing.
Suarez, A. At coitus, human sperm are deposited into the anterior vagina, where, to avoid vaginal acid and immune responses, they quickly contact cervical mucus and enter the cervix. Cervical mucus filters out sperm with poor morphology and motility and as such only a minority of ejaculated sperm actually enter the cervix. In the uterus, muscular contractions may enhance passage of sperm through the uterine cavity. A few thousand sperm swim through the uterotubal junctions to reach the Fallopian tubes uterine tubes, oviducts where sperm are stored in a reservoir, or at least maintained in a fertile state, by interacting with endosalpingeal oviductal epithelium. As the time of ovulation approaches, sperm become capacitated and hyperactivated, which enables them to proceed towards the tubal ampulla. Sperm may be guided to the oocyte by a combination of thermotaxis and chemotaxis. Motility hyperactivation assists sperm in penetrating mucus in the tubes and the cumulus oophorus and zona pellucida of the oocyte, so that they may finally fuse with the oocyte plasma membrane. Knowledge of the biology of sperm transport can inspire improvements in artificial insemination, IVF, the diagnosis of infertility and the development of contraceptives. Passage of sperm through the female reproductive tract is regulated to maximize the chance of fertilization and ensure that sperm with normal morphology and vigorous motility will be the ones to succeed.