1. Difference between mean gestational sac diameter and crown-rump length as a marker of first-trimester pregnancy loss after in vitro fertilization 
Joshua D. Kapfhamer, M.D., Sruthi Palaniappan, Karen Summers, M.P.H., Kristen Kassel, Abigail C. Mancuso, M.D., Ginny L. Ryan, M.D., Divya K. Shah, M.D. 
Fertility and Sterility 
Volume 109, Issue 1, Pages (January 2018)
DOI: /j.fertnstert
Copyright © 2017 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1
Pregnancy loss rates by mGSD − CRL category. P values are for chi-square tests compared with the 5–9.9 mm referent population. mGSD − CRL = difference between mean gestational sac diameter and crown-rump length. ∗P<.001; ∗∗P<.007; ∗∗∗P<.018.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2017 American Society for Reproductive Medicine Terms and Conditions