Weeks Five to Six May Be a Luteal-Risk Window in Predisposed Dog Breeds
A retrospective review of 29 hypoluteoid pregnancies found that 79.3% showed progesterone decline in weeks 5-6. With low-dose medroxyprogesterone and withdrawal 24-48 hours before elective cesarean delivery, 86.2% reached term, but no untreated control permits causal attribution.