Thank you for your query.
Your wife underwent a stillbirth.
There are various causes of stillbirth.
One reason is jaundice and cholestasis
of pregnancy, which commonly causes sudden intrauterine death.
other reasons could be maternal diseases like diabetes, hypertension
, renal disease
Chromosomal abnormalities in the baby are common.
Placental diseases could be responsible.
You should have detailed analysis of the dead baby and placenta and membranes.
Complete evaluation of both of you by a genetic counsellor is recommended.
Also, please avoid a pregnancy for atleast 6 months till detailed testing is done and take regular folic acid