All of the following drugs are effective for cervical ripening during pregnancy except:
Prostaglandin E2
Oxytocin
Progesterone
Misoprostol
Progesterone is pregnancy protective agent and is given for maintenance of pregnancy and is even used as a tocolytic in preterm labour. Protaglandin E1 is misoprostol, E2 is Dinoprostone along with oxytocin are regularly used for cervical ripening for inducing labor or even for inducing aboions.
Labour - normal, abnormal, malposition, malpresentation and their management