Five things to know about the quadruplets:

THE BABIES

Neeta and her three brothers — Dries, Bence and Fjonn — weighed between 655 grams (1 lb., 7 ounces) and 960 grams (2 lbs., 2 ounces) each at birth. Their exact weight today is not known because they are too fragile to be put on a scale.

Neeta is the smallest but is fitter than her three brothers, said Christoph Buehrer, Charite’s director of neonatology. She underwent successful surgery this week to close two small holes in her intestines.

All four babies will remain in intensive care for several weeks and are supported by machines helping them breathe. “Breathing is their most critical vital function,” said Buehrer, adding that it’s not clear yet whether the children will have any long-term health issues because of the premature delivery.

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