Lightest birth (female)

The lowest birthweight recorded for a surviving infant, of which there is definitive evidence, is 212 g (7.48 oz) in the case of Kwek Yu Xuan (Singapore), who was delivered by emergency Caesarian section four months early at the National University Hospital, Singapore, on 9 June 2020 at a gestational age of 24 weeks 6 days. This record was verified and added to the University of Iowa's Tiniest Babies Registry in August 2021.

When born, Kwek Yu Xuan was only 24 cm (9.5 in) long and weighed about the same as an apple. At first, the doctors at the hospital gave her "limited chance of survival".

She was discharged from hospital in August 2021 after 13 months in the Neonatal Intensive Care Unit, at a more healthy weight of 6.3 kg (14 lb). In a statement, the hospital said: "Against the odds, with health complications present at birth, she has inspired people around her with her perseverance and growth, which makes her an extraordinary 'COVID-19' baby - a ray of hope amid turmoil."

According to her mother, Wong Mei Ling, they were shocked by their daughter's premature arrival as a previous child had gone to full term without any complications.