As a young teen I played basketball with a pair of identical twins. One was fairly slight, the other rather stocky and an inch or two taller. Not sure why.
maybe they weren’t identical twins. Unless they did a genetic test they wouldn’t know for sure. I read something once that said that a significant number of same-sex fraternal twins are misidentified as identical.
When you look at the ultrasound, fraternal twins have separate placentas while identical twins share a placenta. This is already visible at 7 weeks of pregnancy. The difference is very important to care during the pregnancy as identical twins have more risky pregnancies due to more possible complications so I would be very surprised if the obgyn does not notice this.
After more research into twins I found I was wrong. Actually, it is more complicated than I thought and placentas are not so straightforward, so the anonymous poster can be right.
That is very interesting. I hadn’t thought yet that the way we identify twins right now is just by looking at them (“they look pretty much the same, they must be identical”).
As a young teen I played basketball with a pair of identical twins. One was fairly slight, the other rather stocky and an inch or two taller. Not sure why.
maybe they weren’t identical twins. Unless they did a genetic test they wouldn’t know for sure. I read something once that said that a significant number of same-sex fraternal twins are misidentified as identical.
When you look at the ultrasound, fraternal twins have separate placentas while identical twins share a placenta. This is already visible at 7 weeks of pregnancy. The difference is very important to care during the pregnancy as identical twins have more risky pregnancies due to more possible complications so I would be very surprised if the obgyn does not notice this.
After more research into twins I found I was wrong. Actually, it is more complicated than I thought and placentas are not so straightforward, so the anonymous poster can be right.
That is very interesting. I hadn’t thought yet that the way we identify twins right now is just by looking at them (“they look pretty much the same, they must be identical”).