How could multiple pregnancies be prevented in assisted reproduction?

Diligence: There are several ways to minimize multiple pregnancies with fertility drugs. Use of the lowest dose possible is helpful in minimizing the risk as this reduces the number of eggs produced by your ovaries. Monitoring egg development with ultrsonography and avoiding pregnancy in cycles with high egg production is also helpful. All fertility drugs will increase your chances of multiple pregnancy.

Depends: Fewer egg implantaions for ivf, the only full proof is selective reduction.