Malignant

Factual error: It is not possible to have a conjoined twin of the opposite sex. They are similar to identical twins, which are always of the same sex, in that they are formed from a single zygote. In the case of conjoined twins, the zygote fails to divide normally.

wizard_of_gore

Upvote valid corrections to help move entries into the corrections section.

Suggested correction: There are always exceptions to the rules and, although VERY rare, it IS possible for conjoined twins to be - rather, end up being - different sexes. There are about 10 documented cases. In one case, is my understanding the conjoined twins started out as males but a genetic mutation (or something) occurred and one male lost his Y chromosome, thereby developing into a female with no ovaries. (The now-female twin would have so-called Turner Syndrome.) I don't have any sources to quote off-hand.

KeyZOid

The male would have lost his Y chromosome after the zygote "split", but he was a monozygotic male.

KeyZOid

Factual error: When the main character wakes up in the hospital after being attacked, she has a resting heartbeat of 69, normal. When she finds out she has lost her baby and begins screaming, her heart rate stays at 69. This is virtually impossible, as even simple emotions raise the heartbeat, and screaming also raises it.

Factual error: It is not possible to have a conjoined twin of the opposite sex. They are similar to identical twins, which are always of the same sex, in that they are formed from a single zygote. In the case of conjoined twins, the zygote fails to divide normally.

wizard_of_gore

Upvote valid corrections to help move entries into the corrections section.

Suggested correction: There are always exceptions to the rules and, although VERY rare, it IS possible for conjoined twins to be - rather, end up being - different sexes. There are about 10 documented cases. In one case, is my understanding the conjoined twins started out as males but a genetic mutation (or something) occurred and one male lost his Y chromosome, thereby developing into a female with no ovaries. (The now-female twin would have so-called Turner Syndrome.) I don't have any sources to quote off-hand.

KeyZOid

The male would have lost his Y chromosome after the zygote "split", but he was a monozygotic male.

KeyZOid

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