Most users also smoke or use multiple other drugs so studies vary as to effects they report. Also there has been no studies of the passage of this drug across the placenta although it is generally thought to cross due to its relatively low molecular weight. Chromosome breakage has been reported but a dose-response relationship was not always apparent. There have been no cases published of fetal anomalies when only pure LSD was administered under medical supervision. Early descriptions of congenital abnormalities involved patients who had used or were using illicit LSD and are believed to be examples of reporting bias, the effects of multiple drugs or other nondrug factors.
More research is needed.
The March of Dimes in your area would be a good resource for you. I've reprinted one abstract which I found in the recent literature. Jul. Abstract Gastroschisis, an abdominal wall defect, most often occurs in infants of young mothers. From structured questionnaire data, we compared sociodemographic, reproductive, and lifestyle factors for 110 mothers of infants with gastroschisis with those for 220 age-matched mothers of normal infants. For cocaine, amphetamine, and marijuana, use of more than one drug showed a stronger association than single drug use.