No.
A mom is the woman who gave birth to you.
It means a horse is a horse regardless where it was born, be it out in the pasture, one the range or in a stall. If a woman gave birth to a baby in a stall it does not make that baby a horse, but still a human being.
a mom is a woman that gave birth to you
The woman who gave birth to you.
She a woman who gave birth to a unicorn
Yes.
Jenny Masche gave birth to sextuplets when she was 32 years old.
Yes, but if the miniature is a mare, then no, the developing foal would kill her if she gave birth.
a woman gave birth to a baby boy.
17
No, a stag is a male deer.
He arose from the blood that dripped from Medusa's severed head.