The 10-year-old frozen embryos gave a 43-year-old Chinese mother what she always wanted, a second child.

The woman, alias Ye, intended to give birth to a boy and a girl ten years ago but she had been diagnosed with infertility. To help her become pregnant, Zhang Qingxue, a doctor of Sun Yat-sen Memorial Hospital in Guangzhou, Guangdong Province, gave her a fresh embryo transplant and ten months later, Ye was able to deliver a baby boy.

However, Ye still longed for a baby girl despite the fact that the one-child policy kept her from doing so, so she decided to freeze the remaining embryos and preserve them in liquefied nitrogen.

Ten years later, as the two-child policy took effect at the very beginning of this year, Ye still pinned hopes on the embryos she had preserved in the hospital.

To her surprise, Ye has become pregnant after doctors in the hospital transplanted the unfrozen embryos.

“[I] could not believe the baby frozen for 10 years is now alive,” Ye said with tears in eyes