Cluster 117: lactation pregnancy breastfeeding test positive current year women standards time 
Cluster 872: breastfeeding pregnancy current active women reported self planning possibility intention 
Cluster 941: breastfeeding pregnancy test negative pregnant entry days study childbearing women 
Cluster 1078: pregnancy pregnant test women positive breastfeeding serum lactating study urine 
Cluster 1277: pregnant planning feeding breast breastfeeding study months pregnancy female lactating 
Cluster 1781: feeding pregnancy breast test positive unwillingness women known urine effective 
Cluster 2219: breastfeeding women lactating study participants eligible registration time zydelig fancd 
Cluster 2251: pregnancy test positive women serum administration enrollment product wocbp urine