Pregnant women here say they are increasingly on edge as they prepare to deliver a baby in a region that has become the epicenter of the coronavirus outbreak in the United States at a time when very little is known about how the disease affects an expectant mother or her unborn child.

“I have so much anxiety now and literally have not stopped crying after hearing that my husband can’t be with me,” said Samantha Moshen, 37, who is due in early June and plans to deliver at the Weill Cornell Medical Center, part of the NewYork-Presbyterian Hospital system. “I haven’t been able to sleep. I’ve just been a mess.”

Moshen, a prekindergarten teacher in Manhattan, said she nearly underwent an emergency C-section with the birth of her first child, a boy who is now 4, and the experience has made her fearful that something may go wrong during her second delivery.