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 who lived during the 18th century and is known only as the first wife of Feodor Vassilyev), a peasant from Shuya, Russia, gave birth to 69 babies in her lifetime, according to Guinness World Records.
The Guinness World Records for most children delivered at a single birth to survive is currently held by Nadya Suleman. A South African woman has broken a Guinness World Record as she gave birth to 10 babies at once, according to a local media report.
Genghis Khan is known as one of the greatest warriors in the history of the world, but that is not the only thing he is known for. He is also known for being the man who had the most kids in the world.
Trisomy 13 (also known as Patau syndrome) - MN Dept. of Health.
The most fertile woman in history is alleged to be an 18th-century Russian peasant called Valentina Vassilyev. Between 1725 and 1765, she is recorded as giving birth to a total of 69 children – 67 of whom survived infancy. This included 16 pairs of twins, seven sets of triplets, and four sets of quadruplets.
Jennifer Waters gave birth to five sets of twins within eight years. She became a surrogate mom to three of the five pairs of children. The mom was thrilled that the five pregnancies resulted in 10 healthy twins.
Monoamniotic-monochorionic Twins
This is the rarest type of twin, and it means a riskier pregnancy as the babies can get tangled in their own umbilical cords. If you have monoamniotic-monochorionic twins, your healthcare provider will monitor your pregnancy closely.
Identical, or monozygotic (MZ), twins have 100 percent of their genes—including those that influence risk for alcoholism—in common, whereas fraternal, or dizygotic (DZ), twins share (on average) only 50 percent of the genes that vary in the population (see figure). Common Environmental Sources.
The DNA of monozygotic twins tends not to be 100% identical, and epigenetic and environmental differences further widen the gap between twin pairs. It's not nature or nurture; it's a complex interaction between our genes, our environment, and our epigenetic markers that shape who we are and what illnesses befall us.
James Elgin Gill was born in Ottawa, Ontario, on May 20, 1987, around 128 days early or 21 weeks gestation. He set a record when he was born for the world's most premature baby.
The shortest known gestation is that of the Virginian opossum, about 12 days, and the longest that of the Indian elephant, about 22 months.
The longest recorded human pregnancy was 375 days, or just over 12 months. The baby was born at nearly 10 pounds and was healthy. The mother, Beulah Hunter, was a 25-year-old teacher from Los Angeles and the father was her husband.
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.
With a fertility rate of almost 7 children per woman, Niger is the country with the highest fertility rate in the world followed by Mali.
The lowest TFR recorded anywhere in the world in recorded history is for Xiangyang district of Jiamusi city (Heilongjiang, China) which had a TFR of 0.41. Outside China, the lowest TFR ever recorded was 0.80 for Eastern Germany in 1994.
Black Alpine Salamanders
Their pregnancies can last from two to three years, depending on the altitude at which the salamanders live. They typically bear two fully developed young.
Cheyenne, who has dark hair and blue-green eyes, isn't the smallest baby ever born. That honor rests with Kwek Yu Xuan, who was born at 7.5 ounces — the weight of an apple — in June 2020 in Singapore.
Boy who was under one pound at birth is the world's most premature infant to survive Guinness World Records and UAB Hospital announced that Curtis Means, who weighed only 14.8 ounces, set the new record at only 21 weeks and one day of gestation.
That's what was written on Jonathon Heeley's discharge papers when he went home from hospital after being born 12 weeks premature and weighing just 374 grams in mid-1992.
The current Guinness World Record for the youngest baby to walk is just 6 months old. Wow. But there may be another contender ‒ Delilah Moore could be the new youngest walking baby, walking unaided at 4 months old, having started standing by herself from 3 months old, according to Bury Times.
Women can reproduce for about half of their lifetime and can only give birth about once every year or so. So it makes sense that women can only have a fraction as many children as men. One study estimated a woman can have around 15 pregnancies in a lifetime.
Occasionally, two sperm are known to fertilize a single egg; this 'double fertilization' is thought to happen in about 1% of human conceptions. An embryo created this way doesn't usually survive, but a few cases are known to have made it — these children are chimaeras of cells with X and Y chromosomes.
It was concluded, among many other things, that identical twins are about 85 percent similar for IQ, whereas fraternal twins are about 60 percent similar. This would seem to indicate that half of the variation in intelligence is due to genes.