Adiposity and Iron Requirements in Pregnancy

Inclusion Criteria:- Pregnant women * Age ≥ 18 years * BMI ≥18.5 kg/m2 * Without current pregnancy complications (for example, severe bleeding, Diabetes Mellitus, hyperemesis gravidarum, ectopic and molar pregnancies) * At least 12 Gestational Week * Singleton pregnancy confirmed with the first ultrasound scan * Participants who are currently taking multivitamins will be included. They will be asked to discontinue any current supplementation. Exclusion Criteria: * Hb \<110 g/L * SF \<30 μg/L * High risk of iron overload (Hb \>150 g/L, transferrin saturation \>45% or SF\> 150 μg/L) * Participants with history of haematological, renal, liver, autoimmune disorders, malabsorptive syndromes * Participants with history of bariatric surgery * Participants who take steroids or anti-inflammatory treatments or drugs that affect gut absorption (proton-pump inhibitors) * Planned home births * Participants currently involved in another research study * Multiple pregnancy * Participants who do not speak English