Complex sentence: Though Clarence supported trials of the pill, he regarded it as impractical with its daily dose requirement and too expensive for widespread distribution, whereas the IUD was both practical and inexpensive, requiring one-time insertion of an inexpensive piece of plastic.
Split into simpler sentences: Though Clarence supported trials of the Pill, he regarded it as impractical, due to its daily dose requirement and relatively high cost. The IUD was both practical and low cost, requiring one-time insertion of an inexpensive piece of plastic.