. 2013 Nov 14;8(11):e80472. doi: 10.1371/journal.pone.0080472

Table 1. Pregnancy outcome after mice were exposed to different regimens of restraint stress during peri-implantation.

Restraint regimens	Treatment	No. of mice showing plugs^*	% Term pregnancy^$	Litter size	Birth weight of pups (g)
Regimen 1	Control	24	91.7±4.2^a	9.2±0.8^a	1.74±0.05^a
	Stressed	24	79.2±4.2^a	9.0±1.1^a	1.73±0.04^a
Regimen 2	Control	24	95.8±4.2^a	11.0±0.7^a	1.80±0.03^a
	Stressed	24	41.7±4.2^b	4.5±1.2^b	1.88±0.06^a
Regimen 3	Control	24	91.7±4.2^a	9.7±0.9^a	1.76±0.02^a
	Stressed	24	62.5±12.5^a	6.7±1.2^a	1.67±0.06^a

^a–b

: Values without a common letter in their superscripts differ (P<0.05) in the same column within stress regimens.

*Each treatment was repeated 3 times and each replicate contained data from 8 mice.

In this paper, % Term pregnancy refers to the ratio of mice giving birth/mice showing vaginal plugs, and Independent samples t-tests were conducted using SPSS to compare the effects of different regimens of restraint stress on term pregnancy.