title: Letter: Weight-lifters and women in labour.
mesh_terms: D005260:Female; D006801:Humans; D007743:Labor, Obstetric; D008297:Male; D009119:Muscle Contraction; D005082:Physical Exertion; D011247:Pregnancy; D012119:Respiration; D013178:Sports Medicine; D014636:Valsalva Maneuver