Ultrasound monitoring of corpus luteum morphological evolution and serum progesterone concentration in pregnant and non-pregnant dogs: A prospective, observational study.

ABSTRACT: The corpus luteum is the only structure producing progesterone during pregnancy in dogs. The aim of this study was to characterise morphological changes of corpora lutea in the bitch and assess their relationship with body weight, serum progesterone concentration, and multiple resorptions. We monitored 26 bitches weekly from ovulation confirmation to 35 days post-ovulation, measuring the corpora lutea diameter via ultrasound examination in combination with progesterone assays. The pregnancy rate was 80.7% (21/26), and all pregnancies were carried to term. Dogs were classified into small (5-15 kg), medium (16-39 kg), and large breeds (40-65 kg). Dog weight significantly influenced mean luteal diameter (P < 0.001), which ranged from a mean ± SD of 3.4 ± 0.5 mm for small dogs to 6.0 ±

SUBMITTER: Paganotto A 

PROVIDER: S-EPMC11986551 | biostudies-literature | 2025 Jun

REPOSITORIES: biostudies-literature