Danish men had the lowest sperm concentrations whilst Finnish men had the highest [14]. Such geographical differences in semen characteristics as presented by these studies remain unexplained.
Higher fertility rates have been recorded in men from Finland than in Britain and Denmark (Jensen et al., 2000; Joffe, 1996). Swedish men have also showed higher semen volume and sperm concentration than Danish men (Richthoff et al., 2002).
Racial differences were seen where Asians had the highest mean semen concentrations (69.2 × 106/mL) while blacks had the lowest (51.3 × 106/mL).
Peak and Decline
Researchers found that semen quantity peaked between the ages of 30 and 35. (Could this be nature's way of making sure a couple conceives before female fertility starts to decline at age 35?) On the other end of the spectrum, overall semen quantity was found to be lowest after age 55.
Can you run out of sperm? No, you can't run out of sperm. Your testes are always making new sperm, which means you'll have a constant supply even if you're masturbating a lot and/or having sex every single day.
Semen quality and age
According to a study conducted in Israel, a man's sperm is in optimal conditions between the ages of 30-35. And in general, after age 55, sperm quality is found to be at the lowest quality.
Age and sperm
Men younger than 40 have a better chance of fathering a child than those older than 40. The quality of the sperm men produce seems to decline as they get older. Most men make millions of new sperm every day, but men older than 40 have fewer healthy sperm than younger men.
Some studies suggest that moderate ejaculation (2–4 times per week) is associated with a lower prostate cancer risk. However, ejaculating more often doesn't mean your cancer risk drops even more.
Retrieved May 20, 2023, from www.marchofdimes.org/peristats. In the United States, the highest fertility rates (per 1,000 women ages 15-44) during 2018-2020 (average) were to Hispanic women (64.8), followed by blacks (62.6), American Indian/Alaska Natives (60.8), Asian/Pacific Islanders (55.6) and Whites (55.3).
You're more likely to have a girl if…
The male has a low sperm count. It could occur naturally or due to certain factors such as heat, particular drugs and toxic substances which kill many male sperm cells, according to Shettles.
Bottom line: Men generally see a decrease in fertility beginning at 35, and the decline progresses from there. The age men are most fertile may be between 30 and 35, but we haven't yet determined a specific window of peak fertility.
Fertility is most likely if the semen discharged in a single ejaculation (ejaculate) contains at least 15 million sperm per milliliter. Too little sperm in an ejaculation might make it more difficult to get pregnant because there are fewer candidates available to fertilize the egg.
Men do not have a 'fertile window' because sperm is continually formed and stored in the testicles, ready to be used at any time. Graphic 1 shows when pregnancy is most likely to happen in people having sexual intercourse without contraception.
A trained expert checks your sperm count, their shape, movement, and other characteristics. In general, if you have a higher number of normal-shaped sperm, it means you have higher fertility. But there are plenty of exceptions to this. A lot of guys with low sperm counts or abnormal semen are still fertile.
While there is no definite age at which male ejaculation ceases, it has been suggested that it may happen when a man reaches his late 40s or early 50s. It is important to note, however, that this is not a universal rule and some men may continue to ejaculate at a later age.
Complications of delayed ejaculation can include: Diminished sexual pleasure for you and your partner. Stress or anxiety about sexual performance. Marital or relationship problems due to an unsatisfactory sex life.
There's no maximum age that stops a man from being able to have a baby. You can become a father long into your older years, but there are risks.
How many sperm do you need to get pregnant? It takes just one sperm to fertilize a woman's egg. Keep in mind, though, for each sperm that reaches the egg, there are millions that don't. On average, each time men ejaculate they release nearly 100 million sperm.
The concentration of sperm is what makes the semen cloudy and thick, so if your ejaculate is watery it is possible that you have a low sperm count. This doesn't mean you're infertile (so precautions to prevent pregnancy still need to be taken for couples that don't want to get pregnant).
Semen can become watery or thinner than usual if someone masturbates or engages in sexual activity multiple times each day. In this case, abstaining from sexual activity for a few days may help treat the issue. Watery semen can sometimes indicate that a person has a low sperm count or reduced semen quality.
According to some studies, 18-year-old males have a refractory period of about 15 minutes, while those in their 70s take about 20 hours, with the average for all men being approximately half an hour.
Obesity, too much alcohol, and smoking cigarettes all negatively affect sperm count and overall sperm health. So does stress. In fact, stress can actually cause sperm abnormalities and lower sperm concentration.