@conference {40420,
	title = {A pilot evaluation of shedding sheep breeds compared with non- shedding breeds for susceptibility to nematodes and flystrike},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {52},
	year = {1992},
	month = {Jan},
	pages = {233-236},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {The effects of ovine placental lactogen (oPL) on wool follicle  development were examined in chronically catheterised singleton Dorset  foetuses. From days 122 to 136 of gestation, five foetuses were infused  intra-arterially with purified oPL (1.2 mg/day) in a carrier medium  consisting of sterile physiological saline plus 15\% plasma from non-  pregnant ewes while another five were infused with carrier medium alone.  Foetal arterial plasma concentrations of oPL were increased six-fold by  the infusion compared with those in controls. Foetuses were euthanased  on day 136 of gestation and skin samples excised from the midside for  histological examination. Treatment of foetuses with oPL did not  influence primary follicle density but reduced the ratio of immature  secondary follicles to primary follicles (Control, 1.22 vs oPL-treated  1.01, Pooled SE = 0.06, P=0.06). These data provide the first evidence  that follicle development in the lamb may be regulated by ovine  placental lactogen.  },
	issn = {1176-5283},
	author = {Litherland AJ and Sorenson E and Niezen J and Bishop D}
}
