Can bisexuals have babies with each other?

It is impossible for a male-to-female person (designated male at birth, but identifies as a woman; often called "transwoman") to become pregnant; she does not have a uterus or ova. (It seems forays are being made into uterus implants for MTF transsexual people - a non-op transgender person would never want such surgery.)

A female-to-male transgender (designated female at birth, but identifies as a man; often called "transman") or transsexual man can get pregnant if he has not had a hysterectomy or surgical sex reassignment (see "Thomas Beatie" on google). It is important to note that not all FTM people get hysterectomies, and it is getting more common for them to carry children, especially, it seems, if they are in relationships where the other partner(s) are not able to become pregnant. If a FTM person has not had a hysterectomy or oophorectomy, then he still has a uterus and ova and, if he stops taking testosterone, the correct hormones to become pregnant.