don , ▁twenty ▁percent ▁of ▁all ▁previously ▁normal ▁pre gn an cies ▁turn ▁into ▁comp lications ▁and ▁high - ris k ▁situations ▁during ▁the ▁course ▁of ▁labor ▁that ▁could ▁result ▁in ▁serious ▁ad verse ▁outcome ▁to ▁mother ▁and ▁baby , ▁including ▁death . ▁ ▁O B - G Y N s ▁do ▁not ▁recommend ▁home ▁birth s , ▁even ▁when ▁attended ▁by ▁a ▁medical ▁professional , ▁if ▁the ▁mother ▁has ▁hy pert ension ▁or ▁when ▁a ▁b ree ch ▁birth ▁is ▁expected . ▁A ▁ 2 0 1 0 ▁meta - analysis ▁of ▁existing ▁research ▁concluded ▁that ▁planned ▁home b irth s ▁had ▁a ▁three ▁times ▁higher ▁mort ality ▁rate ▁for ▁b ab ies . ▁ ▁Pro ponents ▁ ▁The ▁U C ▁movement ▁grew ▁out ▁of , ▁and ▁is ▁an ▁extension ▁of ▁the ▁natural ▁child b irth ▁movement , ▁pione ers ▁of ▁which ▁include ▁Gr antly ▁Dick - Read , ▁Robert ▁A . ▁Brad ley , ▁and ▁Fern and ▁Lam aze . ▁In flu ential ▁pro ponents ▁of ▁U C ▁include ▁Mar il yn ▁A . ▁Mor an , ▁Je ann ine ▁Par v ati ▁Baker , ▁and ▁Laura ▁K . ▁Sh an ley . ▁The ▁Free ▁B irth ▁Society ▁is ▁one ▁influ ential ▁fre eb irth ▁advoc acy ▁group ; ▁it ▁s ells ▁online ▁courses ▁and ▁private ▁consult ations . ▁The ▁founder ▁of ▁the ▁Free ▁B irth ▁Society ▁and ▁the ▁organization ' s ▁instruct ors ▁do ▁not ▁have ▁medical ▁training . ▁ ▁Par v ati ▁Baker , ▁a ▁y og ini ,