938583.fig.001a
(a)
938583.fig.001b
(b)
Figure 1: (a) scatterplot and (b) line of best fit (black line shows line of best fit, and blue line shows ±95% confidence interval) to describe CRL length graphed against “true” gestational age (calculated from date of conception in the IVF singleton cohort). 𝑛 = 1 2 6 8 .