Biomedical subjects

P G Millar

Publications and source records attributed to P G Millar.

13 recordsLinked to original sources

PubMed1977

The effects of progesterone and oestradiol-17beta treatment on plasma hormone levels and on the reproductive behaviour of ewes in late anoestrus and early in the breeding season.

Explore the source record for details and available documents.

Anestrus↗

PubMed1975

Release of progesterone from silicone rubber implants in vitro, and the effects of the implants on plasma progesterone levels in sheep.

Explore the source record for details and available documents.

Animals↗

PubMed1975

The effect of progesterone implants on ovulation and plasma levels of LH, FSH and progesterone in anoestrous ewes.

The effects of 100-mg progesterone implants in anoestrous ewes on plasma progesterone and gonadotrophin levels are described. Implant removal resulted in a surge of plasma gonadotrophins and ovulation, but there was no evidence of behavioural oestrus in 90% of the ewes. These results are discussed.

Anestrus↗

PubMed1975

Plasma progesterone, androstenedione and testosterone concentrations in freemartin heifers.

Plasma concentrations of testosterone, androstenedione and progesterone in freemartins, and normal cyclic and non-cyclic heifers were studied. The plasma testosterone concentrations were in general less than 10 pg/ml in all animals. The mean androstenedione concentration of 28 pg/ml in 10- to 12-month-old freemartins was significantly lower than the mean of 58 to 60 pg/ml for normal 10- to 12-month-old heifers. At 24 months of age the mean androstenedione concentration in the freemartins had risen significantly to 65 pg/ml.

Age Factors↗

PubMed1974