Complex sentence: Though she had intended to take a more active role in the campaign, Jacqueline learned that she was pregnant again shortly after the campaign began and due to her previous difficult pregnancies, her doctor instructed her to stay at home.
Split into simpler sentences: Though she had initially intended to take an active role in the campaign, Jacqueline learned that she was pregnant shortly after the campaign began. Due to her previous difficult pregnancies, her doctor instructed her to stay at home.