You should have a good nutritious diet to recover fast. It is advisable to take multivitamin pills for at least 2 months, and avoid sex for next 6 weeks at least and until the uterus has involuted completely.I would advise you not to conceive for at least 1 year from the date of operation.You should have a complete check up by your doctor at intervals advised by her.If the cause of stillbirth was cord around the neck and body, it is not a recurrent cause for stillbirth. I am sure next time your doctor will look out for cord around neck (by ultrasound), and advise you to keep a count of the baby's movements from 32nd week of pregnancy onwards. Usually, these stillbirths occur near term, when the baby starts descending into the pelvis- that cause a tightening of the cord and resultant stillbirth.