My personal opinion is absolutely not. I'm 25, and my Lyme has derailed my motherhood plans. There is evidence that suggests that Borrelia is perhaps the sole cause of Autism. We all know the profound psychological effects this bacteria had on our emotions and cognition even though our brains were able to develop to adulthood free of the infections. Imagine what it could do to a embryonic brain. One that's only just begun to develop.
How many of us have, or know someone who has, been asymptomatic, declared "Cured!" by their doc, only to relapse? Clearly the bacterial load can be reduced enough to get us to a symptom free state, if only for a short time. I'm afraid that if a mom-to-be has been symptom free for 4 or 5 months, she very well could be still carrying Borrelia that just hasn't multiplied enough again to make it's presence known. Pass that to your baby via the placenta, then the developing fetus is infected.
My plan is to get to 24 contiguous months of complete remission, before I get pregnant. I won't take the chance of passing this to my baby.