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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
Carbamazepine can interfere with the results of home pregnancy tests. If you are taking carbamazepine, do not try to test for pregnancy at home.
Bisphosphonates were first developed in the nineteenth century. They were first investigated for use in disorders of bone metabolism in the 1960s. They are now used clinically for the treatment of osteoporosis, Paget's disease, bone metastasis, multiple myeloma, and other conditions that feature bone fragility.