Prolactin Is a Strong Candidate for the Regulation of Luteal Steroidogenesis in Vizcachas (Lagostomus maximus)

Table 1

Inclusion criteria for the experimental groups.

	Time of capture	Number of embryos in the uterus	Crown-heel length of foetuses (mm)	Estimated gestational age (number of days)^a	Ovulatory stigmata	Serum LH (ng/ml)	Serum P4 (ng/ml)
Early pregnant (EP)	April	8–12	10^b	25–35	No	0.62 ± 0.2	5.71 ± 2.8
Midpregnant (MP)	July	1–2	90–115	90–110	Yes	3.20 ± 0.7	14.52 ± 3.95
Term pregnant (TP)	August	1–2	145–156	144–154	No	1.21 ± 0.18	0.75 ± 0.43
Lactating nonpregnant (LCT)	September	—	—	—	No	0.12 ± 0.1^c	0.21 ± 0.1
Non-ovulating non-pregnant (NP)	September	—	—	—	No	0.02 ± 0.01^c	0.77 ± 0.4

^aAccording to [37]. ^bSize of implantation sites (mm). ^cValues below the detection limits of the assay.