Answer
Yes, both components of abacavir + lamivudine have been shown to cross the placenta in humans.
Sources for this answer
- Abacavir/Lamivudine Dr. Reddy's 600 mg/300 mg Film-Coated TabletsDr. Reddy's Laboratories (UK) Ltd · emc · SmPC §4.6 Fertility, pregnancy and lactation · Version 4Document updated
Sources checked