When the bubonic plague struck the Roman Empire in 540 C.E., the Church declared the field of Greek and Roman medicine heresy, leaving the only treatment for sufferers of any ailment "bleeding".
Concerning a spherical planet Earth, St. Augustine wrote "It is impossible that there should be inhabitants on the opposite side of the Earth, since no such race is recorded by Scripture among the descendants of Adam."
In 398, the Fourth Council of Carthage forbade bishops to read books written by non-Christians.
Jerome, one of the Church fathers living in the fourth century wrote rejoicing that the classical writings of antiquity were being forgotten in his lifetime.
In 415, a Christian mob attacked Hypatia, the head of the Library of Alexandria, and scraped the flesh from her bones with abalone shells, then burned her body. They then proceeded to burn the Library and its 700,000 volumes, which had been collected over several centuries.
In 525, Cosmos Indicopleustes writes a Christian geography book titled "Topography", in which he denies the possibility of a spherical planet, describing earth as "quadrangular". He denies the possibility of containing oceans on a spherical world, and that earth cannot rotate on her axis, because a support for the axis cannot be seen.
To claim the Christianity took the lead in any science is to be simply ignorant of history. To cite just a couple of examples:
Greek astronomers knew Earth was spherical, and orbited the Sun, centuries before the Christian era.
Ancient Egyptians understood the concept of I.U.D.s as contraceptive devices before the time of the Exodus.
more can be found at this link
http://www.ron521.homestead.com/HistoryScience.html
Christianity has never led in any scientific field, but has always embraced scientific advances with the utmost reluctance.