US lawmakers are urgently demanding that Immigration and Customs Enforcement (ICE) disclose how many pregnant immigrants have experienced miscarriages, stillbirths and pregnancy-related hospitalizations while in the its custody, after the agency admitted it lost count last year.

US representatives sent the request following a recent Guardian investigation revealing that the Trump administration is detaining a record number of pregnant women and teens, and at the same has lost track of how many suffered miscarriages.

In a letter sent this month to ICE’s acting director, David Venturella, Democratic representatives Brittany Pettersen, Joyce Beatty and Robin Kelly also asked the immigration enforcement agency to explain what – if any – steps have been taken to recover any missing data about these cases.

Government documents obtained by the Guardian found that ICE had placed more pregnant immigrants in detention last fall and winter than at any time over the previous year.…