The objectives were to evaluate effects of human chorionic gonadotropin (hCG) (3,300 IU i.m.) administered on d 5 after AI on CL number, plasma progesterone concentration, conception rate, and pregnancy loss in high-producing dairy cows. Following the synchronization of estrus and AI, 406 cows were injected with either hCG or saline on d 5 after AI in a randomized complete block design. Blood s...

p REPARTUM and post-partum energy intake has been shown to influence reproductive performance of beef cows (Wiltbank et al., 1962, 1964). A low level of energy before calving was shown to delay onset of estrus following calving. Marked differences in conception rate were noted in cows on varying levels of energy following calving. Conception rate was decreased by low levels of energy after calv...

The objective of this study was to quantify fixed-time AI (TAI) pregnancy rates resulting from reduced intervals between 2 25 mg dinoprost tromethamine (PG) injections on d 5 of a 5-d CIDR-Co-synch estrus synchronization program. Angus and Angus-influenced commercial cows (n = 873) maintained on native pasture at 3 locations were randomly assigned to treatments, blocking for BCS and postpartum ...

©FSRH J Fam Plann Reprod Health Care 2008: 34(2) Background The Teenage Pregnancy Strategy has set a target of halving the pregnancy rate of women under the age of 18 years and of establishing a firm downward trend in the pregnancy rate of women aged under 16 years.1 Progress toward achieving this target is measured both nationally and locally by monitoring teenage pregnancy statistics, produce...

A clinical study was conducted to document the effect of administration of hCG at the time of mating on the conception and litter size in Labrador female dogs. A total of 50 Labrador female dogs were used for this study and were assigned to five different groups, each group contained 10 animals. The conception rate, litter size and gestational period of control group were 60 per cent, 5.83 ± 0....

This article begins with an overview of teenage pregnancy within a social context. Data are then presented on conceptions and repeat conceptions in teenagers. Social predictors of repeat teenage pregnancy are grouped according to social ecological theory. A brief summary of prevention of teenage pregnancy in general is followed by a detailed analysis of studies of interventions designed to prev...

Addressing high rates of unwanted pregnancy Nobody working in reproductive health doubts that the UK has a problem – or rather, several problems. We have the highest teenage pregnancy rate in Western Europe, with levels twice those of Germany, three times those of France and six times those of Holland.1 In real terms, this translates into 90 000 conceptions a year to teenagers in the UK, of who...