Do the new transplanted hairs always fall out, before growing?

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I just had a transplant just over two weeks ago and I understand that typically the new hairs fall out within a couple of weeks then start to grow after 3 months. So far I havent notice the new hairs thinning or falling out, there actually growing like weeds. at this rate within 2 months my new hair will be full length. Is this common? Should they have falled out? Help