How many days after intercourse does the fertilized egg implant?

Sep 10, 2025 Source: Cainiu Health

Dr. Zhang Lu

Introduction

Under normal circumstances, it usually takes 6-10 days for the fertilized egg to complete implantation after conception. During the implantation period, please pay attention to the following: maintain a regular作息 (作息 should be translated as "routine/lifestyle" but seems incomplete in original text), avoid excessive fatigue; maintain a balanced and varied diet, increase intake of high-quality protein and vitamins, and avoid spicy and irritating foods; avoid strenuous exercise and abdominal impacts; maintain emotional stability and avoid excessive anxiety. If there is significant abdominal pain, abnormal bleeding, or unusual discharge,

Generally, after sexual intercourse, the zygote usually takes 6-10 days to complete implantation. Detailed explanation is as follows:

When the zygote formed after sexual intercourse is highly viable, the fallopian tube peristalsis is steady, quickly transporting the zygote into the uterine cavity, and the endometrial thickness is moderate with optimal receptivity, the implantation process can usually be completed within 6 days. At this time, the zygote divides at a normal rate and can rapidly establish contact with the endometrial tissue upon reaching the uterine cavity, thus smoothly initiating the implantation process.

If the zygote has low viability and the fallopian tube peristalsis is slow, significantly delaying the zygote's arrival at the uterine cavity, or if the endometrium is too thin or not sufficiently receptive, implantation may take about 10 days. In such cases, the zygote requires more time to adjust its division rate and must wait until the endometrial conditions mature before gradually completing implantation.

During the implantation period, attention should be paid to maintaining a regular lifestyle and avoiding excessive fatigue; eating a balanced and varied diet rich in high-quality protein and vitamins while avoiding spicy and irritating foods; avoiding strenuous exercise and abdominal trauma; and maintaining emotional stability without excessive anxiety. If significant abdominal pain, abnormal bleeding, or unusual discharge occurs, timely medical consultation and examination are advised.

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