An in vivo culture system for human embryos using an encapsulation technology: a pilot study (2009)
Blockeel, C., Mock, P., Verheyen, G., Bouche, N., Le Goff, Ph., Heyman, Y., ...
BACKGROUND Animal studies have demonstrated better embryo development in vivo than in vitro. This pilot study tested the feasibility of using a novel in utero culture system (IUCS) to obtain normal...
A battery of DNA effect biomarkers to evaluate environmental exposure of Flemish adolescents (2007)
Koppen, G, Verheyen, G, Maes, A, Gorp, U Van, Schoeters, G, Hond, E Den, ...
The present paper deals with the evaluation of a battery of genotoxicity biomarkers in healthy Flemish adolescents and their relation with common pollutants occurring in their life environment. DNA...
How successful is repeat testicular sperm extraction in patients with azoospermia? (2006)
Verheyen, G, Van Steirteghem, A, Devroey, P, Tournaye, H
BACKGROUND: Little is known about the extraction rate in repeated sperm retrieval procedures in azoospermic patients. This study aimed to assess the feasibility of repeated sperm recovery in these...
Investigation of Co-genotoxic Effects of Radiofrequency Electromagnetic Fields In Vivo (2006)
L. Verschaeve, P. Heikkinen, G. Verheyen, U. Van Gorp, F. Boonen, F. Vander Plaetse, ...
Investigation of co-genotoxic effects of radiofrequency electromagnetic fields in vivo (2006)
Heikkinen, P, Verheyen, G, Van Gorp, U, Boonen, F, Vander Plaetse, F, ...
We investigated the possible combined genotoxic effects of radiofrequency (RF) electromagnetic fields (900 MHz, amplitude modulated at 217 Hz, mobile phone signal) with the drinking water mutagen and...
How successful is repeat testicular sperm extraction in patients with azoospermia? (2006)
Vernaeve, Valérie, Verheyen, G., Goossens, A., Steirteghem, A. Van, Devroey, P., Tournaye, H.
BACKGROUND: Little is known about the extraction rate in repeated sperm retrieval procedures in azoospermic patients. This study aimed to assess the feasibility of repeated sperm recovery in these...
How successful is repeat testicular sperm extraction in patients with azoospermia? (2006)
Vernaeve, Valérie, Verheyen, G., Goossens, A., Van Steirteghem, A., Devroey, P., Tournaye, H.
BACKGROUND: Little is known about the extraction rate in repeated sperm retrieval procedures in azoospermic patients. This study aimed to assess the feasibility of repeated sperm recovery in these...
Brugnon, F., Van Assche, E., Verheyen, G., Sion, B., Boucher, D., Pouly, J.L., ...
BACKGROUND: To try to explain the infertility of chromosomal translocation carrier patients, we compared the expression of two markers of apoptosis in the sperm of patients and of fertile donors, and...
How successful is repeat testicular sperm extraction in patients with azoospermia? (2006)
Vernaeve, Valérie, Verheyen, G., Goossens, A., Steirteghem, A. Van, Devroey, P., Tournaye, H.
BACKGROUND: Little is known about the extraction rate in repeated sperm retrieval procedures in azoospermic patients. This study aimed to assess the feasibility of repeated sperm recovery in these...
Brugnon, F., Assche, E. Van, Verheyen, G., Sion, B., Boucher, D., Pouly, J.L., ...
BACKGROUND: To try to explain the infertility of chromosomal translocation carrier patients, we compared the expression of two markers of apoptosis in the sperm of patients and of fertile donors, and...
Verheyen, G., Vernaeve, V., Van Landuyt, L., Tournaye, H., Devroey, P., Van Steirteghem, A.
BACKGROUND: This was a retrospective study to determine if diagnostic testicular biopsy followed by cryopreservation should be the procedure of choice for all patients with testicular failure....
Vernaeve, V., Staessen, C., Verheyen, G., Van Steirteghem, A., Devroey, P., Tournaye, H.
BACKGROUND: Contradictory results are available regarding prediction of testicular sperm extraction in 47,XXY patients. This study, therefore, aimed at assessing the availability of testicular sperm...
Vernaeve, V., Staessen, C., Verheyen, G., Van Steirteghem, A., Devroey, P., Tournaye, H.
BACKGROUND: Contradictory results are available regarding prediction of testicular sperm extraction in 47,XXY patients. This study, therefore, aimed at assessing the availability of testicular sperm...
Vernaeve, V., Krikilion, A., Verheyen, G., Van Steirteghem, A., Devroey, P., Tournaye, H.
BACKGROUND: Little is known about sperm recovery and ICSI using testicular sperm from men with non-obstructive azoospermia who had a previous orchidopexy. We therefore studied the sperm recovery in...
Verheyen, G., Vernaeve, V., Van Landuyt, L., Tournaye, H., Devroey, P., Van Steirteghem, A.
BACKGROUND: This was a retrospective study to determine if diagnostic testicular biopsy followed by cryopreservation should be the procedure of choice for all patients with testicular failure....
Mateizel, I., Verheyen, G., Van Assche, E., Tournaye, H., Liebaers, I., Van Steirteghem, A.
BACKGROUND: Sperm extracted from testicular biopsies of azoospermic men can successfully be used for ICSI. The concern exists that testicular sperm from azoospermic men suffering from severe...
Vernaeve, V., Tournaye, H., Schiettecatte, J., Verheyen, G., Steirteghem, A.Van, Devroey, P.
BACKGROUND: Serum inhibin B, a direct product of the Sertoli cells, may serve as a marker of spermatogenesis. The present retrospective study aimed at evaluating the predictive value of inhibin B for...
Seven years of intracytoplasmic sperm injection and follow-up of 1987 subsequent children (1999)
Camus, M, Staessen, C, Tournaye, H, Van Assche, E, ...
Intracytoplasmic sperm injection (ICSI) with ejaculated, epididymal or testicular spermatozoa was first successful in 1992 and has since become the widely accepted treatment for couples with severe...
Verheyen, G., Tournaye, H., Staessen, C., De Vos, A., Vandervorst, M., Van Steirteghem, A.
A controlled comparison between conventional in-vitro fertilization (IVF) and intracytoplasmic sperm injection (ICSI) has been carried out for patients with ≤5% rapid progressive (type A)...
Nogueira, D., Bourgain, C., Verheyen, G., Van Steirteghem, A.C.
The morphological changes caused by freezing and thawing human testicular spermatozoa have been assessed here. Retrieval of testicular biopsies was carried out on six patients with obstructive...
Verheyen, G, Silber, S, Tournaye, H, ...
Recovery of testicular spermatozoa from azoospermic patients with testicular failure, followed by intracytoplasmic sperm injection (ICSI) is a recent advance in the treatment of male infertility. In...
Crabbé, E., Verheyen, G., Silber, S., Tournaye, H., Goossens, A., ...
Recovery of testicular spermatozoa from azoospermic patients with testicular failure, followed by intracytoplasmic sperm injection (ICSI) is a recent advance in the treatment of male infertility. In...
A chromosome 18 genetic linkage study in three large Belgian pedigrees with bipolar disorder (1997)
Raeymaekers, P, Diependaele, S, De Bruyn, A, Verheyen, G, ...
The contribution of genetic factors to the susceptibility for affective disorders has been firmly established. Recent reports found evidence for a susceptibility locus for affective disorders in 2...
Verheyen, G, Nagy, P, Ubaldi, F, Silber, S, ...
Recovery of testicular spermatozoa from azoospermic patients with testicular failure followed by intracytoplasmic sperm injection (ICSI) is a recent advance in the treatment of male infertility. This...
Comparison of four mechanical methods to retrieve spermatozoa from testicular tissue (1995)
Verheyen, G., De Croo, I., Tournaye, H., Pletincx, I., Devroey, P., Van Steirteghem, A.C.
To maximize the total number of spermatozoa which can be retrieved from a testicular biopsy, four mechanical methods for preparation were compared. In all, 17 biopsies were divided into four equal...
Nagy, Z.P., Verheyen, G., Liu, J., Joris, H., Janssenswillen, C., Wisanto, A., ...
Antisperm antibodies present in the semen can be a primary cause of infertility. If the proportion of spermatozoa carrying antisperm antibodies is very high, then usually a poor result ensues in...
Nagy, Z.P., Liu, J., Joris, H., Verheyen, G., Tournaye, H., Camus, M., ...
High success rates have been reported for the use of intracytoplasmic sperm injection (ICSI) in alleviating essentially andrological infertility. However, neither the relationship between any of the...
Verheyen, G., Tournaye, H., Laurier, K., Devroey, P., Van Steirteghem, A.
Selection of antibody-free spermatozoa by immunobead adsorption was performed as a preliminary test in order to check probable recovery before introducing the procedure in an in-vitro fertilization...
Verheyen, G., Pletincx, I., Van Steirteghem, A.
Sixteen semen samples, 12 donor and four patient samples of high initial quality, were processed to compare the effect of two freezing methods, two thawing temperatures and the effect of dilution and...
Sapienza, F., Verheyen, G., Tournaye, H., Janssens, R., Pletincx, I., Derde, M., ...
The efficiency of spermatozoa prepared by swim-up or by Percoll centrifugation was assessed in an in-vitro fertilization programme on 71 semen samples of a well-defined quality [total number of type...
Feng, Py, Verheyen, G, Vanmontfort, D
In laying hens, the primary sources of progesterone (P4) are the granulosa cells of the 4-5 largest follicles in the hierarchy of the ovary. During forced moulting, cessation of egg production occurs...
Herremans, M, Rudas, P, Bartha, T, ...
Adult fed and starved Warren chickens, 2 yr of age, and approaching the end of the second laying year, were injected iv with 1 of the following products: 10-mu-g of thyrotropin releasing hormone...
Balthazart, Jacques, Verheyen, G, Schumacher, M, Decuypere, E
In the present study, we have established and validated a radioenzyme assay which permits us to quantify progesterone metabolism in the chicken brain. Progesterone metabolism was then studied in five...
Verheyen, G, Chiasson, R B, Huts, C, ...
Normal fed and 2 days fasted Warren chickens were injected intravenously with 100 micrograms of ovine growth hormone (GH) and ovine prolactin and plasma concentrations of thyroid hormones were...