SEARCH MENU CLOSE
IVF in Prague, Czech Republic
Close Image
IVF in Prague, Czech Republic
Articles

Evaluating the quality of collected eggs and embryos

6.10.2022 · 1 min reading
Evaluating the quality of collected eggs and embryos thumbnail

During IVF treatment, you may encounter various abbreviations that indicate the quality of collected eggs or developing embryos. Our laboratory has prepared this article to explain all these technical terms. Your clinic should inform you of the quality of your eggs and embryos during the treatment.

Egg quality: GV, MI, MII

The quality of collected eggs (oocytes) playes a key role in determining whether the IVF process will be successful. An egg that is not ripe is marked GV. This egg is not suitable for fertilisation. An MI-stage egg is almost mature, not yet suitable for fertilisation, but it may mature within a few hours. Mature MII eggs with a visible polar body are used for fertilisation.

MII oocyte: A mature oocyte suitable for ICSI

After fertilisation, the embryos are cultivated in an incubator, where there is a suitable stable environment for their further development. In our laboratory, we use an Embryoscope equipped with a camera that ensures continuous monitoring of embryos. This technology reduces the need to handle the embryos and allows evaluation of crucial moments of development.

Fertilised egg

If the oocyte has been fertilised, we can see the presence of two pronuclei on the first day.

Fertilised oocyte the first day following ICSI: 2 visible pronuclei

Days two and three: Regular division

In the days following fertilisation, cleavage occurs. This means that the embryo cells divide regularly.

The embryo divides regularly on the second day (4-cell embryo)
On the third day the embryo continues to divide regularly (8-cell embryo)

Day four: Morula

On the fourth day, compaction of cells occurs – connections are formed between them and individual cells are no longer visible. At this stage the embryo is called a morula.

Morula

Day five: Blastocyst

On the fifth day a blastocyst forms. The cells are arranged in an embryoblast, from which the foetus develops, and a trophoblast, from which the placenta develops.

At this stage, the embryos are transferred or preserved through vitrification for further use.

Throughout the embryo’s development, we should observe regular development without major deviations or unwanted fragmentation.

Embryo in the blastocyst stage. The trophoblast and embryoblast can be discerned.

Read more

Other articles

Vitamin D and fertility: How vitamin D can help you get pregnant thumbnail 5 min reading · Articles

Vitamin D and fertility: How vitamin D can help you get pregnant

Adequate levels of vitamin D contribute to the optimal functioning of the body not only during the treatment of infertility using assisted reproductive methods (for example, IVF), but also when trying to get pregnant naturally. This is because it helps the production of sex hormones and the proper functioning of the reproductive system. In women it supports the correct course of ovulation, in men it improves the quality of sperm

Progesterone during IVF and pregnancy thumbnail 4 min reading · Articles

Progesterone during IVF and pregnancy

Progesterone is a female reproductive hormone. Its production begins in small amounts already during the maturation of the follicles, increases after the formation of the corpus luteum and rises steeply in pregnancy.

Increase your well-being during the fertility period thumbnail 6 min reading · Articles

Increase your well-being during the fertility period

Practical tips from the webinar with our fertility coach Katharina Appia. 

BOOK YOUR FIRST CONSULTATION

Take the first step towards treating infertility

Contact Icon
We will help you Contact us We’ll get back to you by the next business day
Help Line Lady
IVF in Prague, Czechia +420 257 225 751 We’re online Mon-Fri 8:00 - 16:00