Sneezing will not affect the embryo’s implantation, don’t worry too much, if you have intercourse during the ovulation period, it is best to go to the hospital about 10 days after the intercourse to take a blood test for HCG to determine pregnancy. If sneezing is caused by cold, it will have adverse effect on the embryo development, because cold in early pregnancy may be caused by bacterial or viral infection, which will easily affect the embryo development. If sneezing is occasional, it is considered normal phenomenon, and there is no need to be treated; if sneezing is frequent, you need to go to the hospital for blood test to see if it is bacterial or viral infection, and take medication reasonably according to the result of the test, so as to avoid influencing the development of the baby. The cause of embryo implantation failure may be thin lining, endocrine disorders, intrauterine infection and other conditions, so implantation failure need to go to the hospital for examination, only to find out the reason for the reasonable use of medication under the guidance of the doctor to regulate.