Table 1. Observed Adverse Effects of Either Silenced or Augmented Cannabinoid/Endocannabinoid Signaling during Pregnancy in Mice.

	cannabinoid signaling
	silenced	optimal	augmented
pregnancy events	Cnr1–/–	WT	Faah–/–
embryo development	retarded	normal	retarded
oviductal embryo transport	retention	on time	retention
blastocyst competency		conducive to competency	impediment to competency
uterine receptivity	suboptimal	receptive	suboptimal
fetoplacental development	retarded/resorption	healthy	retarded/resorption
parturition	preterm	full term