Double Cloprostenol Administration During mid Luteal Phase of Oestrous Cycle does not Modify the Interoestrous Interval in Gilts

Figures & data

Figure 1. Mean (±standard error) plasma progesterone concentrations at 24 and 72 h after two vulva injections of D-cloprostenol 6 h apart on day 9 of their oestrous cycle. Pretreatment values are also provided. Means with the same letter are significantly different from one another (P<0.05).

Table 1. The effects of D-cloprostenol injection on days 7, 9 or 10 of the oestrous cycle on interestrous interval length in gilts (mean±standard deviation).

Administration day	Gilts, n	Duration of the treatment oestrous cycle,d	Duration of the preceding oestrous cycle, d	P
7	30	20.6±0.7	20.1±0.2	0.45
9	29	19.2±0.4	20.2±0.4	0.35
10	28	18.9±0.5	20.0±0.5	0.07