Olga Bogadiza is six months pregnant and also expecting twins. She fled from Kyiv too, desperate to find somewhere safe to have her babies, away from the shelling and curfews.

It took three days to reach Lviv, she says, and during all that time she couldn't eat or drink from fear.

"Have you heard of the saying, 'animal fear'?" she asks me. "It's not like the fear of pain, or giving birth - it's fear that makes your skin hurt. You're so scared you can't eat or think. When I arrived in Lviv, the doctor said I had lost 3.5kg (7.7lbs), and that my babies' lives were in danger because their development had stopped."

In Kharkiv, Dr Kondratova says staff had made the decision to stay on the intensive care ward with the smallest babies, even after air-raid warnings.

"You can't take a child of 600g to the basement," she said. "It would be a one-way trip. So we stay with the children and live through the bombings with them."