- Can twins be conceived on different days?
- How can you have twins?
- How do I know if I’m pregnant with twins?
- Is there a natural way to have twins?
- Is 40 too old to have a baby?
- Can a woman get pregnant while already pregnant?
- Can you have identical twins with different fathers?
- What are the odds of twins having different fathers?
- What is a stone baby?
- How many eggs are left at age 30?
- Can two different sperm form a baby?
- Who carries the twin gene?
Can twins be conceived on different days?
Although two fetuses develop simultaneously in superfetation, they differ in maturity, having been conceived days or even weeks apart.
Superfetation is suspected only when the twins are of different sizes and at different stages of development.
It is typically noticed during a routine checkup on the ultrasound..
How can you have twins?
Identical (monozygotic) twins happen when a single egg (zygote) is fertilised. The egg then divides in 2, creating identical twins who share the same genes. Identical twins are always the same sex, so if your twins are identical, you’ll have 2 girls or 2 boys.
How do I know if I’m pregnant with twins?
Ultrasound. Although the factors above may be signs of a twin pregnancy, the only sure way to know you’re pregnant with more than one baby is through an ultrasound. Some doctors schedule an early ultrasound, around 6 to 10 weeks, to confirm the pregnancy or check for issues.
Is there a natural way to have twins?
The American Society for Reproductive Medicine reports that twins happen naturally in about 1 out of every 250 pregnancies. The rate is much higher in women who get fertility treatments.
Is 40 too old to have a baby?
Due to advances in technology surrounding fertility, pregnancy, and delivery, it’s possible to safely have a baby at age 40. However, any pregnancy after age 40 is considered high risk.
Can a woman get pregnant while already pregnant?
Superfetation means that a woman becomes pregnant while she is already pregnant. It’s extremely rare — fewer than a dozen cases of superfetation have been reported in the medical literature, said Dr.
Can you have identical twins with different fathers?
It is possible for twins to have different fathers in a phenomenon called heteropaternal superfecundation, which occurs when two of a woman’s eggs are fertilized by sperm from two different men. … Identical twins occur if that fertilized egg divides into two separate eggs, early in the pregnancy.
What are the odds of twins having different fathers?
Well, what are the odds? Kasraie has found two studies of the incidence of heteropaternal superfecundation, both from the early 1990s. One author claims that one in 400 pairs of fraternal twins (those arising from two eggs) fits the description. The second author puts the figure at one in 13,000 cases of paternity.
What is a stone baby?
A lithopedion – also spelled lithopaedion or lithopædion – (Ancient Greek: λίθος = stone; Ancient Greek: παιδίον = small child, infant), or stone baby, is a rare phenomenon which occurs most commonly when a fetus dies during an abdominal pregnancy, is too large to be reabsorbed by the body, and calcifies on the outside …
How many eggs are left at age 30?
The research predicts that before birth, women have roughly 600,000 follicles present in her ovaries, but at age 30 typically 12% of these will remain.
Can two different sperm form a baby?
With identical twins, one egg is fertilized by one sperm, and the embryo splits at some later stage to become two. Occasionally, two sperm are known to fertilize a single egg; this ‘double fertilization’ is thought to happen in about 1% of human conceptions.
Who carries the twin gene?
This is why fraternal twins run in families. However, only women ovulate. So, the mother’s genes control this and the fathers don’t. This is why having a background of twins in the family matters only if it is on the mother’s side.