Question about to much fluid

I had my 33 week appointment today and they did a sonogram and said my daughter weighs 4lbs 13oz and is in the 67th percentile for weight looks great but my fluid is a little high. Told me not to worry but said I'll start doing weekly appointments now to keep an eye on it. Anyone else have this happen? Was there a specific reason for it? And did everything turn out ok? Or was there complications as the weeks passed?