Her trip will also take her to the capital, Kyiv, amid reports that babies may have been snatched at birth in other Ukrainian cities.
The alleged baby thefts go back to the autumn of 2002, but the case achieved wider publicity last year after lawmakers from across Europe tabled a motion at PACE, which brings together 46 countries.
Underlining real concern over baby trafficking from Eastern Europe, they pointed to newspaper ads in Moldova encouraging single mothers there to sell a child for 3,000 euros.
"Sex Traffickers Prey On Eastern Europeans"
"Slavery Survives, Despite Universal Abolition"