Expression of genes involved in progesterone receptor paracrine signaling and their effect on litter size in pigs

Table 1 The mRNA level of target genes in the endometrium during implantation (M ± S.D.)

Target	Non-pregnant	D 13 of pregnancy		D 18 of pregnancy		D 24 of pregnancy
Target	Non-pregnant	Attachment sites	Inter-sites	Attachment sites	Inter-sites	At sites	Inter-sites
PGR	1.01 ± 0.25^Aa	−2.33 ± 0.01	−1.31 ± 0.21	−2.60 ± 0.21	−2.12 ± 0.16	−10.34 ± 0.16^B	−3.94 ± 0.06^b
IHH	1.05 ± 0.33^a	1.34 ± 0.34	2.67 ± 0.71^b	2.12 ± 0.71^b	3.92 ± 1.48^b	3.48 ± 1.58^b	2.60 ± 0.67^b
NR2F2	1.02 ± 0.18^A	3.80 ± 0.91^B	4.77 ± 0.99 ^B	4.42 ± 0.17 ^B	5.32 ± 0.73 ^B	6.18 ± 1.75 ^B	2.18 ± 0.64
BMP2	1.02 ± 0.18^Aa	2.41 ± 0.19 ^B	3.61 ± 0.50 ^B	4.54 ± 0.94 ^B	4.57 ± 0.97 ^B	3.61 ± 1.52 ^b	3.90 ± 1.70 ^b
FKBP4	1.02 ± 0.21 ^A	1.79 ± 0.39	1.50 ± 0.52	0.63 ± 0.19	0.99 ± 0.15	0.35 ± 0.08 ^B	0.76 ± 0.21
HAND2	1.07 ± 0.14 ^a	1.83 ± 0.33	2.09 ± 0.50	2.93 ± 0.83 ^b	2.98 ± 0.87 ^b	1.08 ± 0.16	1.11 ± 0.16