When Donna Yip, a lawyer who lives in the financial district, went into labor with her second child in June, she had more than just her husband and medical team in her room at NewYork-Presbyterian Morgan Stanley Children’s Hospital.

Jackson Simmonds from the Julien Farel Restore Salon & Spa was also there, with a curling iron, hair dryer and boar bristle hairbrushes in his Longchamp tote. They were his tools to style Ms. Yip’s hair immediately after delivery.

Ms. Yip is one of a growing number of women who are booking hairstylists and makeup artists to come to their hospital room for postpartum grooming, typically with the first photographs of mother and child in mind.

“I think someone realized, ‘Why should I not look good for that great picture that I’m going to show everybody, the first picture of my child?’ ” said Joel Warren, an owner of the Warren-Tricomi salons.