Do whats best for you. I had a manual removal of retained placenta with no 1. Later as a midwife I learnt that it was retained as I had such a long labour. I had being having regular painful contractions for 2days (48hrs) before the hospital would admit me saying I was not dilated enough. I was 7cm when I was admitted finally to the labour ward and still did not birth for 10hrs later which included almost 3hrs of pushing (posterior baby) and because she was not distressed they were happy for me to keep pushing until she showed signs she had had enough. Well I did birth her eventually all on my own surprisingly being OP. Well the placenta didn't come out then. I have now learnt as a midwife that because my labour and birth was so long my uterus was exhausted and as soon as bubba was out it thought its job was done. Despite all the drugs under the sun nothing was making my uterus contract. After 4hrs and bleeding profusely off to OT I went. (I now work at the same hospital and 1hr is the policy to wait for placenta to be expelled before OT) Also 2hrs is the limit for pushing in the second stage (what happened to me I ask?) Well with number 2 as I went to OT and had a PPH (because the placenta wasn't out and no contractions to decrease the size of the uterus) with no 2 I was hit with a IVC (cannula) and all the drugs as soon as bubba came out. Placenta came out within a minute or two with limited cord traction. No problems and I felt great was able to shower on my own and walk to the postnatal ward much nicer then the first time when I couldn't shower for 24hrs later (eewww). Our hospital policy is literally IVC as soon as you walk in the door with a history of retained placenta or PPH. So maybe you should find out why it happened if you know! One time is not enough to say you have a strong history. I know with my second baby the placenta had several succtenturiate lobes which are like little placentas stuck to the main placenta. I wonder if that happened with the first baby and thats why it didnt want to come out. GL do what you want and if it wont come out you can always switch to the IVC after your baby is born and then have the drugs.