Tag: embryonic development

Waiting for AI results

Couple waiting for artificial insemination results

During the two-week wait after artificial insemination, women experience a series of very different feelings as well as strong emotions, since she will soon find out whether she is pregnant or not.

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13 weeks pregnant

Development of the embryo week 13

It’s the first week of the fourth month of pregnancy. You’ve left behind the first trimester, which means that the embryo’s shape is closer to that of a normal baby. During the second trimester his internal organs will develop.

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Nine weeks pregnant

Ninth week

It corresponds to the first week of the third month of pregnancy. The embryo starts to have a more human-like aspect, its head is very big, although now stands slightly more detached from the body, given that the body itself is developing too.

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First month of pregnancy

Early stages of pregnancy

It’s the beginning of a long process. Many women don’t even know they are pregnant during the first month. The most important event is the implantation of the embryo in the endometrium.

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Embryo classification according to their quality

Embryo quality

Embryos can be classified in 4 categories –from A to D– ranging from best quality to least developed embryos. This classification is mainly visual and rather subjective, but there are also several studies to identify their metabolic activity.

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Embryo quality and grading

Grade I

Assessment of embryo quality is determined by checking their development once a day from the moment of fertilisation to the day in which embryo transfer is performed –on day 3 or day 5, depending on the case.

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