1.   Engagements are plotted before either of the marriageable parties have felt a hint of elevated hormonal activity.

2.   He also directs a program that studies endocrine disrupters, which are chemicals like isoflavones with hormonal activity that disrupts the endocrine system.

3.   Hormonal activity can increase the risk of ACL tears.

4.   The Pill creates deficiencies in nearly all nutrients required for normal hormonal activity.