10.1371/journal.pone.0143219.g001 Shengyu Xu Shengyu Xu Dingyue Wang Dingyue Wang Dongsheng Zhou Dongsheng Zhou Yan Lin Yan Lin Lianqiang Che Lianqiang Che Zhengfeng Fang Zhengfeng Fang De Wu De Wu Concentrations of progesterone (P) in normal (CON) or nutrient-restricted (NR) gilts. Public Library of Science 2015 restriction estrus cycles body weight gain blood progesterone concentrations deg NR gilts rna gene con Anestrus Gilts Induced ng anestru 2015-11-18 03:39:29 Figure https://plos.figshare.com/articles/figure/_Concentrations_of_progesterone_P_in_normal_CON_or_nutrient_restricted_NR_gilts_/1606839 <p>CON denotes normally fed gilts (2.86 kg/d) and NR denotes nutrient restricted gilts (1 kg/d). The day of the second occurrence of standing heat was designated as d 0. P, progesterone; E2, estradiol. * denotes <i>P</i> < 0.05. n = 10.</p>