Understanding Society User Support

Hi,

I am a research assistant and I am currently searching for maternal datasets containing maternal BMI or weight and height data.
Scanning your website for these variables I have found that you have collected data on weight and height of potentially pregnant women in the 'Understanding Society Cohort'. I would be very grateful if you could clarify how many respondents answered that they were pregnant and if you have further data on what stage of the pregnancy the women were when they have completed the questionnaire.

This is important for my research as the datasets I am interested in must have information of whether the maternal weight and height was recorded either pre-pregnancy or during pregnancy (specifically during early pregnancy).

Thank you for your help in advance.
Nicoleta