Heparin-induced thrombocytopenia (HIT) occurs in up to 1% of patients receiving unfractionated heparin. HIT may occur even when very-low-dose heparin (eg, used in flushes to keep IV or arterial lines open) is used. The mechanism is usually immunologic.
The hair loss can seem more extreme if your hair grew much more than normal during pregnancy, or if you have long hair. Most women will return to their usual hair growth cycle within six months, or between 6 and 12 months after birth.
My kids are all born with a head full of dark brown hair and blue eyes. They all keep some shade of blue for their eyes but at 6 months their hair falls out completely and they are bald babies for 6 months or so. Then it comes back in very blonde.