DS was 4.4kg, birthed in the reclined position. In hindsight I should've been more upright, but every time I tried I felt nauseated so I stayed put. His birth was 7.5 hours and required vacuum and episiotomy.
DD was 4.2kg, birthed in just 3 hours (nearly didn't make it to hospital on time). I gave birth standing up, pushing stage is listed as 6 minutes...she practically fell out of me. So clearly standing up worked well for me. I got a 2nd degree tear with her, I think it was a little too fast.