I remember pulling lots of calves when I was growing up in the 60s and 70s. I never kept records, but I would bet the farm that we pulled far more each year back then than we do now. In 2012, I assisted 1 calf born from the entire calf crop. In 2013, I assisted 6, of which 2 had legs back and 3 were backwards, and one was a heifer with mixed up twins trying to be born at the same time. We never used a calf puller ( only because we had never seen one) back then,but I remember my dad and I sitting side by side and pulling for all we were worth. That said I also never remember having a c-section either. My dad says that the first c-section in the first 70 years on this farm was in 1975, when we bred a Simmental heifer to the wrong bull. We did weigh our calves back in the 70s, and I will have to see if I can find some of our calving records from that time. We were running 350-400 cows in the early 70s and we were breeding about 1/2 our Shorthorn cows to Maine and Simmental sires, and we weighed all the calves. I do remember many of these " exotic" calves weighing much more than our PB Shothorn calves, but we never had many vet assists during calving. Our first registered Shorthorns arrived here in 1917, and we have had 3 c-sections since then. The first was a heifer with a twisted uterus, and two were backwards calves that we could not get up into the birth canal.
In regards to this discussion on Line 1 Herefords, this topic brings back some unpleasant memories for me. I used to have a herd of Herefords, that were rich in L1 genetics. I got this set of cows from a breeder who had used several sires from the L1 bloodline. One of the reasons I decided to get this set of cows was because there were 17 full sisters ( by ET) that were sired by a leading L1 sire at the time. Their dam was also sired by a L1 sire. I had never seen a prolapsed uterus until these cattle arrived, and by the time they left, I was well acquainted with them. These cows did stay in shape year round, but only because they basically kept their calves company from June 1st until weaning. I think the average humming bird had as much milk as these cows did. It did not take much time to decide that we would disperse these cows when the opportunity presented itself!