14

Short Answer Masturbating does not decrease fertility or sex drive Long Answer Historically, masturbation was discouraged for a variety of reasons including the thought that it lead to mental health problems. However, that was disproved. The abstract of Coleman, E. (2003) states Research on masturbation has indicated that, contrary to traditional ...


13

Just as a small background before answering your question: as suggested in the previous answers, the menstrual cycle is regulated by complex interactions between the hypothalamic-pituitary-ovarian (HPO) axis and the uterus. The hypothalamus secretes gonadotropin-releasing hormone (GnRH), which stimulates the release of follicle stimulating hormone (FSH) and ...


9

This is an interesting question, which comes frequently on Health SE. First, here a small background on vaginal secretions: More than 30 compounds have been described in the vaginal secretions. Several "sources" for those secretions have been indentified: vulvar secretions from sebaceous, sweat, Bartholin and Skene glands, secretions from the endometrium, ...


8

A decade ago, a study (1) reviewed the evidence regarding the effect of cycling on impotence (due for example to pudendal nerve entrapment) and the effect of repeated scrotal temperature on spermatogenesis. While sparse evidence suggested a possible link, the author concluded that those results needed to be replicated in larger studies. Some years later, ...


6

Does the uterus return to its original (pre-pregnancy) size after a full term birth? Good question. No. Uterine involution, the return of the uterus to the nonpregnant state postpartum, does involve a remarkable decrease in size, but it's not as small as it was before pregnancy. Nonpregnant uterine size increases with what we call parity, or the number of ...


5

Thank you for the very interesting question regarding the prostate. Let me first briefly explain a few historical confusions regarding the nomenclature of prostatic disorders with particular attention to your ‘congestive prostatitis’, which may be called an almost extinct creature! Classifications of Prostatic Disorders Meares and Stamey (1968) suggested a ...


5

The answer at the moment seems to be a clear "maybe". There is a Cochrane review of this very topic. Combination contraceptives: effects on weight. A Cochrane review is a study where people collect a lot of other studies on the subject, determine whether the studies were well-designed, and, if they were, review those studies and draw a conclusion from ...


4

Older paternal (and maternal) age in fact is associated with some increase in disease, though at fairly low rates. Cancer is largely a disease of probability. One does not need to have mutations in all of their cells to develop cancer, just one. But a parent does not pass on all their mutations in all their cells, they pass on just one, which need not have ...


4

There are no relevant researches that links the two things. Moreover, some specialists say that masturbation can prevent, or at least decrease, the risk of develop a prostate cancer. Keep in mind that these are new studies, so data are too few to create a rule. With the informations that researchers obtain, they can say that the risk is reduced (1). But as I ...


3

Dispersion is roughly 12 days This study found that only 10% of those with a regular cycle of 28 days had ovulation in the 14th day, dispersion was from day 10 up to day 22. In this study, only 69 out of 696 cycles were regular. Ovulation occurred as early as the eighth day and as late as the 60th day of the menstrual cycle. ​Figure1 shows the distribution ...


3

Closely Related to: What is the latest evidence on underwear affecting sperm count? Elevated temperatures are thought to decrease sperm counts in males. Mayoclinic.org Elevated temperatures impair sperm production and function. Although studies are limited and are inconclusive, frequent use of saunas or hot tubs may temporarily impair your sperm ...


2

"If a couple has no common defective gene, they can produce a big healthy population from just two people, right?" No. As described in the review "The genetic basis of disease" Essays Biochem. 2018 Dec 3; 62(5): 643–723. Published online 2018 Dec 3. doi: 10.1042/EBC20170053 "we now know that, on average, each individual has several ...


Only top voted, non community-wiki answers of a minimum length are eligible