Question to the Department of Health and Social Care:

To ask His Majesty's Government how many women having uterine transfer of one or more embryo(s) produced from frozen oocytes after thawing had a positive pregnancy test between 2014-24; and how many of these pregnancies resulted in a spontaneous abortion (1) before 12 weeks of gestation, and (2) after 13 weeks of gestation.

The information is not available in the format requested. The Human Fertilisation and Embryology Authority (HFEA) holds information on the number of pregnancies, interpreted as instances where one of more foetal heart pulsation was recorded, and records of total numbers of miscarriages, not by weeks, from 2014 to 2023 which is shown in the following table:

The data is as shown on the HFEA’s register database on 17 December 2025. This is a live database so these figures reflect the data on this day and are likely to change over time. This reflects time needed for clinics to submit data and undergo validation as stated on the HFEA register. Data shown includes only treatments using patients own thawed eggs.