cephalic presentations
... that the piriform shape of the uterus is given as the reason for the predominance of cephalic presentations at term?
... that the <a class="mw-disambig" href="./Piriform" id="mwG68" rel="mw:WikiLink" title="Piriform">piriform</a> shape of the <a href="./Uterus" id="mwG7A" rel="mw:WikiLink" title="Uterus">uterus</a> is given as the reason for the <a href="./Predominance" id="mwG7E" rel="mw:WikiLink" title="Predominance">predominance</a> of <b id="mwG7I"><a href="./Cephalic_presentation" id="mwG7M" rel="mw:WikiLink" title="Cephalic presentation">cephalic presentations</a></b> at <a href="./Childbirth" id="mwG7Q" rel="mw:WikiLink" title="Childbirth">term</a>?