The Two-Minus-One Pregnancy by Ruth Padawer.
As Jenny lay on the obstetrician’s examination table, she was grateful that the ultrasound tech had turned off the overhead screen. She didn’t want to see the two shadows floating inside her. Since making her decision, she had tried hard not to think about them, though she could often think of little else. She was 45 and pregnant after six years of fertility bills, ovulation injections, donor eggs and disappointment — and yet here she was, 14 weeks into her pregnancy, choosing to extinguish one of two healthy fetuses, almost as if having half an abortion. As the doctor inserted the needle into Jenny’s abdomen, aiming at one of the fetuses, Jenny tried not to flinch, caught between intense relief and intense guilt.
More at the NYT.