Ultrasound Reference Chart Based on IVF Dates to Estimate Gestational Age at 6–9 weeks’ Gestation

Table 2

Baseline characteristics of study participants the IVF singleton cohort.

Baseline characteristics—Singleton IVF cohort 𝑛=1268
Age (years)—mean (SD)	34.3 (4.28)
Gestation at birth (weeks)—mean (SD)	38.6 (2.15)
Birthweight (grams)—mean (SD)	3266 (603.2)
Treatment cycle—median (range)	2 (1–38)
Embryos transferred—median (range)	2 (1–3)

SD: standard deviation.