zygosity

annualeventhistory_ip6.zygosity

Question label:

Zygosity of twin

Question universe:

if ff_ivlolw = 1 | ff_everint = 1 (interviewed at prior wave or has been interviewed previously)
and if (GRIDVARIABLES.Newmum = 1) & (Nnewborn > 1) & (all LChLv = 1) & (two or more newborn children with the same DOB or birthdays one day apart) (Biological mother of more than one newborn child in hh and two or more newborns share the same birthday or have birthdays one day apart)
and if TwinConf = 1 & ((sex of child 1) = (sex of child 2)) (Twins in household and the twins are of the same sex)
and if TwinZyg = 1 (Identical twins in household)

Further details:
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