Doors (1) Costs (1) Complications (1) Children (1) Prevention (1) Diseases (1) Extrapolation (1) Human reproductive technology (1) Yarn (1) Time (1) Thread (1) Temperance (Virtue) (1) Tact (1) Risk (1) Relaxin (1) Multiple pregnancy (1) Pregnancy (1) Ovum implantation (1) Ovulation--Induction (1) Moderation (1) Landscapes (1) Premature labor (1) Newborn infants (1) Immune response (1) Hypothesis (1) Humility (1) Generosity (1) Fertilization in vitro, Human (1) Fertilization in vitro (1) Discretion (1)