When I purchased vf I had version 2 and I had triplets on my second attempt first family first generation and twins on my second attempt with the second generation. my secondly family I had triplets in the second generation on the third attempt. I never used the baby boost. then i upated to version 5 and have not had multiples since. I am on my fourth generations in the first two families and third generation in the two new families. I am wondering if the version 5 has a problem with multiples I have used the baby boost and still nothing.