"due to pregnancy" is correct and usable in written English.
You can use it to describe a state of being caused by pregnancy. For example, "She was unable to work due to pregnancy."
She claims 60,000 women a year are forced out of their jobs due to pregnancy.
Any period of incapacity due to pregnancy, or for prenatal care.
In November 2013, Ferouz's mum was brought from Nauru to Brisbane to give birth to him, due to pregnancy complications.
The IFIC says that ginger has been shown to help treat nausea, especially nausea due to pregnancy.
I work at hourly rate, not a salary and they tried to cut my pay by £1.50 an hour due to pregnancy related sickness.
In the hierarchy of remedies for nausea and vomiting due to pregnancy, the practice bulletin ranks a combination of doxylamine and vitamin B6 among "first-line therapies".
They note that half of pupils will fail to qualify for secondary school, with 3,000 girls a year dropping out due to pregnancy.
HBC wasn't the original choice to play JK Rowling's cackling, wild-haired dark witch, but joined the project after Helen McCrory dropped out due to pregnancy.
Approximately 300m women in poor countries currently suffer from some sort of illness due to pregnancy or childbirth.
