Still, officials at other local hospitals say that, based on patient due dates, they are anticipating increases of 10 to 30 percent in midsummer births compared with the last year.

“There’s definitely an uptick,” said Dr. Jacques Moritz, director of the division of gynecology at St Luke’s-Roosevelt Hospital Center. “This is just old basic physiology. There’s no Internet and no cable. What else is there to do?’

Dr. Moritz estimated that the number of women expected to deliver at his hospital at the end of July would be 10 to 20 percent higher than it was last year.

At NewYork-Presbyterian Hospital/Weill Cornell Medical Center, Dr. Amos Grunebaum, chief of obstetrics and gynecology, said, “when we looked at the numbers, it’s 20 to 30 percent busier than usual for the last week of July and going into that first week of August.”

One of his patients, Rachel DeGregorio, has a 3½-year-old daughter and had been trying for nearly two years to have a second child. She had even scheduled fertility treatments. Then the hurricane struck.

Ms. DeGregorio, 34, who has a doctoral degree in neuroscience, and her husband, Scott, a 33-year-old radiologist, spent the day stranded in their Upper East Side apartment after his office in New Jersey was closed because of the storm. Their son, who they are planning to name Jack, is due July 24.