Retrieved June 1, 2023, from
Females are most fertile within a day or two of ovulation, which is when the ovaries release an egg. But, it is possible to get pregnant in the days leading up to ovulation, as sperm can survive for several days inside the female body.
These studies showed that women of Asian descent had lower average BMI, good embryo quality and number of embryos produced, normal hormone levels, and healthier diets which usually contribute to higher fertility.
With a near fertility rate of almost 7 children per woman, Niger has the highest fertility rate in the world, closely followed by Mali. The population growth of Niger is amongst the top 10 highest in the world.
Birth rate highs and lows
According to the CIA World Factbook, Nigeria has the highest birth rate in the world at 47.28 average annual births per 1,000 people per year.
In 2020-21, the fertility rate was 1.66 babies per woman, similar to the rate recorded in 2018-19. In 2019-20, the rate had fallen to 1.61 babies per woman. According to the report, the data suggests people “adapted to the uncertainty of the pandemic and quickly caught-up on delayed childbearing plans”.
The total fertility rate, a measure that gives the average number of children an Australian woman would have during her lifetime should she experience the age-specific fertility rates present at the time was 1.7 births per woman in 2021. This was up from the 1.59 for 2020, the lowest total fertility rate ever reported.
Mariam Nabatanzi Babirye (born December 25, 1980) also known as Maama Uganda or Mother Uganda is the most fertile woman in the world. She has given birth to a total number of 44 children, 38 of whom are alive. As of April 2023, her eldest children are 28 years and the youngest are 6 years old.
South Korea has the world's lowest fertility rate, a struggle with lessons for us all. A woman holding her daughter looks at a view of Seoul in 2019. The fertility rate in South Korea, which has the world's lowest rate, hit 0.78 in February.
The age where a man is most fertile is between 22 and 25 years. It is suggested to have children before the age of 35. After this age, the male fertility begins to worsen. After 35, the sperm might result in pregnancies where mutations can occur.
Yes, recent studies have found that East Asians have the highest median sperm concentrations compared to other racial groups in the United States. Other semen parameters such as motility and morphology did not show significant differences among the races.
Data suggest that Black men have lower mean ejaculate volumes, sperm concentration, and total motile sperm counts.
It's true that fertility is genetic, and there actually are some people who can be classified as “super” fertile. This is all dependent on sperm and egg health. One study on the topic classified super fertility as having a monthly fecundity rate (the ability to get pregnant) of 60% or greater.
Fertility declines with age in both men and women, but the effects of age are much greater in women. In their 30s, women are about half as fertile as they are in their early 20s, and women's chance of conception declines significantly after age 35. Male fertility also declines with age, but more gradually.
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.
Japan's high cost of living, limited space and lack of child care support in cities make it difficult to raise children, meaning fewer couples are having kids.
Angola, Benin, DR Congo, Mali, and Niger have the highest TFR. The most populous country in Africa, Nigeria, had an estimated TFR of 4.57 in 2023. The second most populous country, Ethiopia, had an estimated TFR of 3.92 in 2023.
When you know your average menstrual cycle length, you can work out when you ovulate. Ovulation happens about 14 days before your period starts. If your average menstrual cycle is 28 days, you ovulate around day 14, and your most fertile days are days 12, 13 and 14.
Valentina Vassilyeva and her husband Feodor Vassilyev are alleged to hold the record for the most children a couple has produced. She gave birth to a total of 69 children – sixteen pairs of twins, seven sets of triplets and four sets of quadruplets – between 1725 and 1765, a total of 27 births.
A woman in her early to mid-20s has a 25–30% chance of getting pregnant every month. Fertility generally starts to reduce when a woman is in her early 30s, and more so after the age of 35. By age 40, the chance of getting pregnant in any monthly cycle is around 5%.
It's no secret that Australians are having fewer children. The latest ABS statistics reveal our fertility rate was 1.7 – well below the so-called replacement rate needed to keep the population growing. The last time our fertility rate was this low we started literally paying people to have babies.
Infertility is defined as the inability to conceive a pregnancy after 12 months of unprotected sexual intercourse. It affects about 1 in 6 Australian couples of reproductive age.
The most common birthday in Australia is September 17th! The least common birthday (you may have guessed it is) is Christmas Day, the 25th of December. If you are inclined to count leap years in the mix then the 29th February is the least common birthday, but only because they occur once every 4 years.