www.theguardian.com/world/2020/may/16/bame-majority-pregnant-women-hospitalised-covid-19-troubling-midwives
Before people say it's due to age and obesity the data was modified for age and obesity. In addition pregnant women should be taking supplements.
Previous studies have shown in the UK, black women are 5 times as likely and Asian women 2 times as likely than white women to die from pregnancy complications.