Where delivery is planned, either by elective caesarean section or induction of labour, LMWH maintenance therapy should be discontinued 24 hours prior to planned delivery.

Regional anaesthetic or analgesic techniques should not be undertaken until at least 24 hours
after the last dose of therapeutic LMWH.
LMWH should not be given for 4 hours after the use of spinal anaesthesia or after the epidural catheter has been removed, and the epidural catheter should not be removed within 12 hours of the most recent injection.

Regarding 'Prophylactic dose'-Regional techniques should be avoided if possible until at least 12 hours after the previous
prophylactic dose of LMWH.
LMWH should not be given for 4 hours after use of spinal anaesthesia or after the epidural catheter has been removed and the catheter should not be removed within 12 hours of the most recent injection.

Use of UFH predisposes patients to thrombocytopenia..

Obstetric patients who are postoperative and receiving unfractionated heparin should have platelet count monitoring performed from days 4 to 14 ,

or until heparin is stopped.