Agree with Dr. Suman. There is actually quite a bit of Chinese literature on this.

Also, the danger during pregnancy has been questioned recently by a couple of studies. It will be interesting to see what our Reproductive Guidelines updates recommend when redone:

https://www.sciencedirect.com/science/article/pii/S0890623820301234
https://ard.bmj.com/content/77/4/500