There isn't one single country with the absolute highest infertility rate, but studies show East Asia and Eastern Europe often report the highest female infertility prevalence, while South Asia, the Middle East, and North Africa have seen significant recent increases, especially in male infertility, with countries like the Philippines, India, and Turkey showing notable high rates or rises. Rates vary greatly, but overall global trends point to rising infertility burdens in developing regions, linked to factors like environmental changes, lifestyle, and healthcare access.
The highest fertility levels are observed in Niger (13.6 children on average), South Sudan (13.5 children), Chad (12.1 children) and in the Sahelian countries more generally. In only four countries (South Africa, Botswana, Lesotho and Namibia) is male fertility below 6 children per man.
Male infertility accounts for around 40% of infertility cases, while female infertility contributes to approximately 40% of cases. In the remaining 20 % of cases, infertility is attributed to a combination of factors involving both partners or unexplained causes.
More than 90% of male infertility is caused by sperm abnormalities, including poor-quality sperm, low sperm count, abnormal morphology or a combination of all these. Other reasons that may affect a man's fertility are: anatomical problems, genetic defects and hormonal imbalances.
In our study, black women had a significantly higher odds of ever having experienced infertility than white women. Even after adjustment for socioeconomic position, marital status, and other risk factors for infertility, this disparity persisted.
In the United States, the highest fertility rates (per 1,000 women ages 15-44) during 2021-2023 (average) were to Hispanic women (64.4), followed by Blacks (55.2), Whites (52.5), American Indian/Alaska Natives (49.3) and Asian/Pacific Islanders (48.1).
Glazer et al also demonstrated that Asians had the highest sperm concentrations and Blacks the lowest, similar to our data. Furthermore, additional studies have looked at Chinese populations but lack a comparator group,10 and Japanese populations with limited sample size of only 324 men.
A complete lack of sperm occurs in about 10% to 15% of men who are infertile. A hormone imbalance or blockage of sperm movement can cause a lack of sperm. In some cases of infertility, a man produces less sperm than normal. The most common cause of this condition is varicocele, an enlarged vein in the testicle.
Infertility is commonly caused by problems with ovulation (the monthly release of an egg from the ovaries). Some problems stop an egg being released at all, while others prevent an egg being released during some cycles but not others. Ovulation problems can be a result of: polycystic ovary syndrome (PCOS)
Signs and symptoms you may notice include:
Just remember that there are no guarantees and the odds of conceiving a boy or a girl are almost exactly the same for each and every pregnancy.
One of the most common reasons for infertility today is delaying becoming parents. Many couples are choosing to have children later in life due to career goals, financial reasons, or personal preferences. However, age plays a huge role in fertility, especially for women.
The best approach to staying fertile in today's busy world is to take care of yourself: eat well, sleep well, reduce your stress and take all things in moderation. Consider your body a temple and take care of it. A good healthy body is a good reproductive body.
Results. Significant racial differences for various parameters including the incidence of normal ranges values in the racial groups were found. The highest mean sperm concentration had men of Central/South Asian descent (median: 38.0 × 106/mL) while Southeast Asian men had the lowest (median: 22.0 × 106/mL; p < 0.0001) ...
In 2024, the fertility rate in Taiwan was estimated to be at 1.11 children per woman, making it the lowest fertility rate worldwide.
(14) analyzed semen samples from 1082 fertile men from European cities (Copenhagen, Paris, Edinburgh, and Turku) and found that Danish men had the lowest sperm concentrations and total sperm counts, followed by French and Scottish men, while Finnish men had the highest sperm counts.
Risk factors
A woman's peak reproductive years are between the late teens and late 20s. By age 30, fertility (the ability to get pregnant) starts to decline. This decline happens faster once you reach your mid-30s. By 45, fertility has declined so much that getting pregnant naturally is unlikely.
Give yourself an extra fertility boost by upping your intake of these foods:
Men's age significantly affects men's fertility and semen quality. Although sperm production continues at older ages, sperm quantity and quality decline after the age of 35. From the age of 45, sperm may begin to show genetic changes, challenging the belief that men can procreate indefinitely.
Best foods for fertility
Now, there are several reliable at home and mail-in sperm testing kits that can be used. The YO sperm kits measure sperm concentration and motility [the number of “viable swimmers”], which are good ways to screen if there is an underlying fertility problem.
Drinking and Smoking
Consuming alcoholic beverages lessens sperm count and concentration as well as the percentage of normal sperm. Smoking cigarettes can harm DNA, prompting sperm mutations. The bonus? Cutting back on alcohol and tobacco is good for general health as well as sperm production..
Human semen is composed of fluids from the seminal vesicles, prostate, and bulbourethral glands which mix during ejaculation. The seminal vesicles contribute 70% of semen volume, which contains fructose as the main energy source for sperm.
Racial disparities in health have been well noted, with blacks, in particular, having poorer health than whites across a broad range of outcomes.