 age)                                                                     Neck circumference      ---------------------------------------------------------------- -------------------- ---------   Weight before pregnancy[†](#jdi00000-note-0000){ref-type="fn"}   0.000                \<0.000   BMI before pregnancy[†](#jdi00000-note-0000){ref-type="fn"}      0.000                \<0.000   Waist circumference[†](#jdi00000-note-0000){ref-type="fn"}       0.000                \<0.000   