Biology of Ovarian Cycles, Pregnancy and Pseudopregnancy in the Domestic Cat

摘要: Puberty in the female cat occurs between ages of 8 and 10 months. Cats are seasonally polyoestrous, reflex ovulators. The oestrous cycle can occur as often every 2-3 weeks. Ovulation usually 24-36 h after copulation, implantation 12-13 days copulation. duration gestation is 64-67 (average 66 days). corpora lutea secrete increasing amounts progesterone, starting 1-2 ovulation. If occurs, progesterone concentrations continue to increase throughout 25-30, then slowly decline rest pregnancy. In absence pregnancy, reach their peak progestational activity within 10-15 decline, with basal values being noted by 30-35. Relaxin produced fetoplacental unit beginning at about day 20 continuing Prolactin production increases from 35. Like those prostaglandin F2 alpha, prolactin plateau 50 abruptly just before delivery.