Table 1.

Counts of total conceptions, pregnancy losses, live births, proportion of pregnancies lost, and relative risk of pregnancy loss in rhesus and Japanese macaques from ONPRC by year, data collected years 2014–2020 from PRIMe

Year	Total Conceptions	Pregnancy Losses	Live Births	Proportion of Pregnancies Lost†	RR (95% CI)‡
2020	82	43	39	0.524	1.0 (Ref)
2019	103	8	95	0.078	6.8 (3.4, 13.6)
2018	177	23	154	0.130	4.0 (2.6, 6.2)
2017	245	29	216	0.118	4.4 (3.0, 6.6)
2016	211	33	178	0.156	3.4 (2.3, 4.9)
2015	153	18	135	0.118	4.5 (2.8, 7.2)
2014	120	17	103	0.142	3.7 (2.3, 6.0)

Abbreviations: ONPRC, Oregon National Primate Research Center; PRIMe, Primate Records and Information Management; RR, relative risk; CI, confidence interval; Ref, reference

^†Proportion of pregnancies lost calculated as the number of pregnancy losses divided by number of total conceptions

^‡Relative risk is calculated for every year compared to 2020, statistically significant results are bolded as determined by 95% confidence interval

^§All years combined (2020 v. 2014–2019): RR = 4.1 (3.2, 5.4)

^¶Proportion of pregnancies lost from 2014–2019 = 0.127