Vitamin B12 Dose Escalation Trial in Pregnancy

There are four groups of women (n = 20 total) who will receive B12 dosing once daily, including group 1a (sufficient baseline B12, pregnant), group 1b (sufficient baseline B12, non-pregnant), group 1c (insufficient baseline B12, pregnant), and group 1d (insufficient baseline B12, non-pregnant).

There are two groups of women (n = 10 total) who will receive B12 dosing once daily, including group 2a (sufficient baseline B12, pregnant) and group 2b (insufficient baseline B12, pregnant).

The participants (n = 20 total) will be randomly assigned to receive either a once per day B12 dose or a twice per day B12 dose. The four groups at this dose level include: group 3a (sufficient baseline B12, pregnant, Q12), group 3b (sufficient baseline B12, Q24), group 3c (insufficient baseline B12, pregnant, Q12), group 3d (insufficient baseline B12, Q24).