Investors can be well-rewarded for seeking out growth stocks that are hitting new 52-week highs. Such price movements usually imply that something is going right with the business, thus prompting investors to bid up its share price. That said, investors still need to put in the time and effort to understand the business and the direction it is headed. Share prices may have hit highs but this run will only continue if the company has strong prospects for growing both its revenue and net profit. Here are four US growth stocks that hit their 52-week highs recently that you may wish to add to your buy watchlist. Church & Dwight (NYSE: CHD) Church & Dwight is a leading US producer of sodium bicarbonate, also known as baking soda. In addition, the company also manufactures and markets a wide range of household, personal care, and speciality products under brand names such as Arm & Hammer, Trojan, Xtra, and Oxiclean....